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Wild Mass Guessing for Arrow. Please place new WMGs on the appropriate page.

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    The Green Arrow 

Ollie will train Diggle as Yao trained him in order to create this universe's version of Conner Hawke.
After all, Conner, in the comics, is Ollie's son which in this universe would be difficult to put in (womanizing ways aside). But having Diggle become an Expy of it would work out fairly well. It may be that Diggle doesn't form his own identity, but they two use the identity interchangeable in order to be more effective and, as seen, to give each other alibis or accomplish things when the other can not.
  • Probably not happening.
  • Diggle has gone out in the green suit at least once.

Ollie's membership in the Russian Mafia will trip him up
He holds the rank of captain, which is a difficult thing to do. And it can not have escaped the attention of the gangsters he speaks to that a highly-placed member of Starling City society is technically their boss. Ollie will find himself trapped between his obligations as a captain and his desire to save Starling City.
  • Jossed. This never really comes up. Oliver never maintains his role as a Captain and fully admits early on that eventually he'll likely burn the bridge with the Russia Mafia, and finally does it in Season 2.
  • Several years later, it finally pops up in Season 5 when a reporter with an ax to grind manages to stumble on a photo taken of Oliver when in Russia.

Oliver will grow his beard out over the course of the series
Because it would be awesome. And it's already starting to look thicker than in the pilot episode.
  • Jossed Oliver wore a fake beard and wig to make his shipwreck and staying on the island ever since story more believable.

Green Arrow, Huntress, Black Canary, and Red Arrow/Arsenal (Diggle) will form The Outsiders.
Certainly a driving point of the first season is how Ollie needs to trust people, so if nothing else, having a regular group of people he works with would be a natural conclusion.
  • Played with, as of Season Two, people who have allied and/or know about Oliver Queen - John Diggle, Felicity Smoak, Barry Allen, Sara Lance and Roy Harper (so everyone but the Huntress). No official name yet, other than Team Arrow, which apparently puts Oliver in a funk. Team Arrow also includes Quentin Lance who knows about his daughter being Black Canary, but not Oliver Queen being the Arrow.
  • Now that Huntress has been related, she may join Team Arrow sometime next season.

Oliver always planned on recruiting Felicity.
That's why he didn't really care when his excuses became so transparent. He knew eventually he would need a hacker, and his shooting just pushed up her date of recruitment.

Ollie and Felicity will enter a relationship... but then Laurel finds out Ollie's the Hood
Tommy's prediction that Laurel will then run back to Ollie will come true. Ollie is then faced with a choice: go with Laurel, someone he may only love the idealized version he held on to and whom may only really be attracted to him because he's a 'bad boy', or go with Felicity, someone who knows and understands him as he is now and with whom the relationship is far more realistic in expectations.
  • Likely Jossed as of "Deathstroke", when Slade reveals Oliver's identity to Laurel.
  • Oliver does enter a relationship with Felicity, and in Season 4 it's revealed Laurel's been pining for Ollie the whole time. However even when Felicity has broken up with Oliver, he doesn't return Laurel's feelings or consider getting back together with her.

Ollie will make his famous chili recipe
And it'll be a CMoF to see a badass like Diggle unable to keep it down while someone like Thea would just say "could be spicier."

The green hood is magical.
Its "magical power" being that it augments the badassery of whoever wears it at the moment. Let's look at the persons who have worn it until now:
  • Yao Fei: With it, able to defeat several guys at once, except on a bad day. Without it, still a good fighter, but much easier to defeat.
  • Oliver: Seems to have slightly more trouble defeating one guy (see ep 5 where Malcolm sends an assassin to kill him, it looks like this guy would have been dispatched in seconds if Ollie had worn the hood, and I am not talking about putting an arrow into the guy) when not wearing the hood.
  • Shado: I've got nothing for now.
  • Dig: Is able to defeat several guys at once barehanded (and with minor effect of surprise), that is his most badass moment so far (okay, going against Malcolm with Ollie was awesome too, but that didn't stop them from getting their asses handed to them)

Ollie'll get himself intentionally thrown in a hellhole prison
It would be something along the lines of getting to a target he can't get to as the Hood. It could also play like Batman: Arkham City.
  • Played with. Diggle gets himself thrown in a Russian gulag to break Lyla out.

Ollie's accepted as QC's CEO because of Verdant.
Oliver does not seem like someone who a board of directors would approve of as the CEO. He never graduated college, and while he was there, he was more interested in parties than studying. However, after he came back, he managed to open and run a massively popular club with no formal training. Clubs and restaurants are among the hardest business to run, and the board would know that.

Ollie will call Slade out on his vendetta by reminding him that Slade doesn't have to live with the guilt of feeling responsible for Shado's death every day
It would have absolutely no effect on him, but still...
  • Very likely, cause Slade intends to keep his promise to kill Ollie's loved ones before he kills him. But whether or not he'll escape Purgatory remains to be seen.

The Arrow (not Oliver Queen) will win the next mayoral election
Someone will nominate and enter the Arrow as candidate for mayor initially as a joke. Either that or a bunch of people decide to just vote for the Arrow 'off-ballot'. Due to the track-record for previous mayoral candidates and the lack of good choices among the current candidates, the Arrow ends up winning in a land-slide victory. Of course, unless Oliver reveals his secret identity to the public, he won't actually be able to become the new mayor.
  • As it turns out, he does become a popular write-in candidate, and after the former mayor's involvement in a plot to destroy the world comes to light, Oliver is tapped to be the replacement on this basis.

Oliver will be revived by the Lazarus Pit
Ra's would have a pit nearby the place he duels. * The Arrow needs to die in order for the Green Arrow to be reborn and become the Messiah/he Hero. When he is revived he will have his scars and other injuries healed (Making him faster and stronger) and no more tattoo's ( the shirtless scene did highlight Olivers scars and Ra's lack of the same.
  • Perhaps by Ra's himself, and to demonstrate his own intelligence and manipulative nature, he will use the adjoining compromise of Arrow's sanity and willpower to convince Arrow to join the League as an agent, possibly by telling Oliver that he's going to settle the score with Malcolm one way or another, and it's Arrow's only chance to ensure his friends and family aren't caught in the crossfire. And the reason this won't break Ra's honor code about killing Oliver and blessing him? He killed Oliver Queen,but not the Arrow.
*Alternative : Ra's kicks Ollie off the cliff so he would find the pit himself ( he showed sadness when he saw how young Ollie was plus he still needs him to find Sara's killer.
  • Jossed. Oliver never actually dies, he's just very close to death.

Alternatively, Red Arrow will become the lead character as a result of Oliver getting killed by Ra's al Ghul, and Oliver will stay dead.
The show is just called Arrow, after all.
  • Jossed.

Ollie's inevitable resurrection
...... Will result in the disappearance of all his scars and tattoos. It can't be easy for the makeup department to apply them all for every shirtless scene, which is probably why they've cut back on the shirtlessness in season three.
  • Jossed because Oliver doesn't get resurrected, he simply was on the verge of death.

Ollie hated Sarah for leaving him.
It would certainly explain being best buds with Malcolm, her murderer, now and completely sweeping her death under the rug like it was nothing.

The event that will ultimately lead into Oliver becoming Green Arrow
.It's his time as a member of the League of Assassins. Look at his situation. He can no longer be The Arrow since Roy fakes his death after publicly exposing himself as The Arrow to save Oliver's reputation after Ra's revealed his identity to Quentin, who in turn exposed him to the public and was arrested until Roy's aforementioned sacrifice. Since The Arrow is considered Legally Dead at this point, what superhero name is left for Oliver to use? That and the League costume of this show looks eerily similar to the Injustice: Gods Among Us Green Arrow costume.
  • Kinda Confirmed. It wasn't actually his time as a member of the League, but it does tie into all the events of the end of Season 3 with "Arrow" being outed.

    The Black Canary 

Laurel will Take A Level in Badass and become Black Canary
She's already frustrated with the corruption of Starling City and might be inspired by Green Arrow to become a vigilante herself.
  • It might be revealed that her mother was a vigilante herself. Or was given the nickname "Black Canary". Quentin will tell about how he first met Laurel's mother, she was wearing a black dress, black jacket, fishnet stockings, and black boots at the time, and may have been a natural blonde.
  • Episode 3 shows that her father trained her in how to kick ass.
  • In "Betrayal", Tommy believes she drawn to dangerous men and at the end of the episode, she's no longer her contact. But later on in the series, she might have feelings for him again. Also, due to the law no longer working for her or too many boundaries, she feels the only way to take matters is to become a vigilante herself.
  • In "Blind Spot", she lost her career due to her drug addiction. This may lead her to become Black Canary in order to save the city from Brother Blood and Slade.
  • This becomes more likely now that her sister is Killed Off for Real.
  • Confirmed. Laurel puts on a mask and declares herself the Black Canary halfway through Season 3. (Although her level of Badass is still being worked on.)

Laurel, if she becomes the Black Canary, will eventually end up with Oliver.
The writers have hinted that Season 3 onwards will be about Laurel becoming the Black Canary. Meanwhile most of the series will be about Oliver and Felicity's relationship, because the producers know unlike Lauriver they're pretty popular together and will actually retain viewers. However in the final season Oliver will break up with her or Felicity will leave/die (possibly even in the final episode al la, HIMYM style) allowing Laurel to step in. The series will end with the Green Arrow and Black Canary standing on a rooftop, and Laurel saying she's always known Oliver 'like her own name/in her bones'. And fans will cry and start making eternally burning shrines to Felicity Smoak. But hey, if the writers are willing to kill off the awesome Sara for Laurel to fulfill superhero identity, there's no reason they won't kill Felicity for Laurel to fulfill her true love "destiny" with Oliver. After all her name is Dinah.
  • Jossed. Although Laurel does become the Black Canary but when she confesses her love to Oliver, he doesn't feel the same way and is still in love with Felicity. Then Laurel's killed off.

Starling will appear
In the comics, she's one of Black Canary's best friends. She could show up as a party girl friend of Laurels, Oliver stumbles onto the fact she's a vigilante/spy/mercenary, she proves to be at least his equal in hand to hand, the two team up to take down the villain of the episode (Who is also Starling's target), and as Starling gets ready to leave, she informs Laurel that maybe this "Robin Hood" Character has the cities' best interests at heart.
  • Original troper- actually it would be more interesting, and more in character, if she tracks him back to his hideout or his bedroom and surprises him there.
  • It's possible given the fact the city is named Starling, this character will not show up and, in fact, this suggested introduction was used instead for the first Black Canary. ("first" because she's not Dinah.)

Laurel Lance will not become the Black Canary.
Rather, she will die in a tragic event. However, as he is preparing to hunt those responsible Oliver is confronted by a mysterious girl who reveals that she is Dinah, Laurel's cousin, and Laurel was killed in an attempt to smoke out her aunt, the retired Black Canary. Instead of coming her self, the older Canary sent her daughter to take up her mantle, avenge her cousin's death, and teach Oliver the difference between being a vigilante and a hero, in preparation for recruiting him into a more developed world of superheros.
  • Episode 3 of season 2 shows that Black Canary is already present but can't be Laurel as they were in two places at once. Also, Laurel's full name is Dinah Laurel Lance, so I don't know why she'd have a cousin named Dinah. The Canary is probably her sister.
  • The blonde vigilante is confirmed to be Sara Lance.
  • Partly Jossed. Partly Confirmed. Laurel does become the Black Canary but she also dies in a tragic event, when Damien stabs her. Laurel's cousin doesn't appear but a different mysterious girl does become a copycat Black Canary for an episode and Sara is resurrected as the White Canary.

Laurel's mom is Dinah Drake
So far, so good. Since Black Canary is a legacy character, and Alex Kingston is a confirmed Action Girl, I can see Dinah Drake Lance being the current Black Canary, but she'll decide she's too old for this (Badass though she may be, Kingston is in her late forties,) and the title will be passed down to Dinah Laurel Lance during the show. It might also explain what her mother's been doing all these years.
  • Jossed. The Canary is Sara Lance and her name is a translation from one she had as a League Assassin

Helena and Laurel will become friends. Felicity will become the Oracle to complete the Birds of Prey layout.
Because Barbara Gordan with her Batman-connection may be off-limits, computer geek Felicity Smoak can work as this BoP team's Oracle.
  • This is also similar to Chloe Sullivan, who becomes the Oracle of the Justice League, calling herself "Watchtower". She's also blonde.
Jossed. Laurel is killed in Season 4. But Felicity does end up acting as the team's Oracle/Chloe Sullivan figure known as "Overwatch".

McKenna will become Black Canary.
  • Jossed for the time being.

Laurel will go through a massive case of Character Development, which includes transforming her into Black Canary, and her returning to the name Dinah
With 'the Hood' now cutting her off, and tired of being put in danger, she'll seek out more training to improve herself, and get it from former heavyweight champion boxer Ted Grant. During this, he'll take to calling her 'Canary' as a term of endearment, and a slightly insulting nickname to motivate her, until she fully becomes a badass on par with Oliver and Diggle (well they could explain it away as that Grant is just the latest of a log list of trainers, giving them room to name drop some of DC's Badass Normal characters as her previous trainers). During this time, she'll be presented with a case where she needs the vigilante's help, but has no way to contact him. Under Ted Grant's guidance, she dons her own costume to deal with it, coming face to face with the Hood.
  • Confirmed, except for her going by Dinah.

Canary's origin will include Rape as Backstory
  • Given Sarah's particular interest in defending women and the constant mentions of "You don't know what I had to do to survive!", its not unlikely, but still unfortunate, that we may be heading towards this reveal.
    • Alternatively, it could be relating to her relationship with Ivo, which has a certain abusive boyfriend vibe to it. Its quite possible her experiences with him made her sensitive to men hurting/using women weaker than them.

Sara did die in Year Two on the Island
She seems to be running from the League of Assassins, and they may be the ones who taught her everything she knows, as Oliver was surprised at her new fighting prowess. She may have been roped into joining the League after Ra's had brought her back to life. But she disagreed with their philosophy and returned to Starling City, and following Oliver's footsteps, she donned a mask.
  • If that's the case, now that she died in the Season 3 opener, Nyssa might come to get her body to revive her again.

Felicity and Canary will start a relationship
Canary is confirmed bisexual in the comics and the two did seem quite friendly (canary called Felicity cute) and Felicity went into motor mouth mode which she now seems to reserve for people she considers attractive (correct me if I'm wrong) and neither seemed to make a big deal over the fact Felicity saw Canary topless—possible foreshadowing?
  • Canary has been confirmed bisexual in the show, making out with Nyssa when she came to kill her. The same cannot be said for Felicity at the moment. Of course, same sex seeing each other minus clothes is not usually a big deal.
  • Jossed. Never happens, and with Felicity clearly hetero and either Canary no longer being on Arrow this is not going to happen.

Sara's "friend" she mentions visiting in "Seeing Red" is Nightwing...
... and not Nyssa, though she is also a likely candidate. However, Nyssa would be back in Nanda Parbat, and Sara's departure from the League left too volatile a state for her to be seen keeping in touch with one of its members (and the daughter of Ra's Al Ghul, no less). Backing out of Team Arrow may have been a result of her prevailing killing intent, but the situation with Slade is enough to at least convince Sara to at least leave town, if all she wants is to distance herself from Oliver, Sin, and her family. So it's likely she may have gone to Nightwing knowing Oliver is taxed and needs all the help he can get.

Though this WMG is based solely on the rumours that have been around since the start of the second season concerning the casting of Nightwing. Since nothing was confirmed, and considering that 3 episodes to the finale is a little late to introduce a brand new character. Though it isn't entirely impossible for him to make a cameo in the finale as someone who could show up for season 3.

Either Sara or Laurel will get get Black Canary's screaming power.
Trailers for the upcoming The Flash (2014) series, which takes place in the same universe as Arrow, suggest that an exploding particle accelerator will give several people superpowers. Sara or Laurel might be one of these people.
  • Now that you mention it, Laurel's Big "NO!" when she watches Sara die is akin to a very distinctive screech.
  • A highly unlikely theory, but thinking about it we didn't know if Laurel was either in Starling or in Central when the particle accelerator was turned on. Laurel could've have some how got caught in the explosion without knowing when she could have been visiting her mother during the time of the Particle Accelerator being turned on. But like mentioned before, this is a highly unlikely theory.
  • Laurel also took a DUAL dose of vertigo to the throat, specifically in the vocal cords.
  • Partly Confirmed. Cisco adapts Sara's sonic handheld device to connect to Laurel's vocal chords, rather than her being hit by the particle accelerator. However it's not nearly as powerful as Dinah's Canary Cry in the comics.

At some point in the series Sara will be killed off for real and Laurel, who has received training from Ted Grant (Wildcat), will pick up the mantle, but will also add the word 'Black' to name.
  • Well this is depressingly Confirmed, right from the start of season 3—to an extent of course, but at this point it's pretty obvious where it's going. Laurel will most likely add "Black" as a sign of mourning.
    • Sara's Back from the Dead now, but her title and position on the team have remained with Laurel.

Laurel breezed through law school on her looks.
It's the only way to explain how she managed to graduate without knowing such basic things as the definition of perjury or any of the things she did over the course of Moira Queen's murder trial that should have resulted in an instant mistrial, like hiding evidence from the defense.

Sara's killer
  • I'm thinking the person who killed Sara was Slade Wilson. He may have been put in an ARGUS prison on Lian Yu, but then Amanda Waller puts him on the Suicide Squad, even though he nearly got Starling City destroyed. One of his first jobs was to kill Sara, then soon work his way up the rest of Team Arrow. Of course the other suspects are Malcolm Merlyn or, hell, Ra's Al Ghul.
    • Probably not; Sara's reaction showed that not only did she know the person, but she didn't think that person would attack her. Had it been Slade, she'd likely have instantly gone into attack mode, not question mode. As well as that, Slade's not an archer, nor has he been shown to use a bow at all in the past, so its unlikely its him.
  • Tyrion Lannister: Who else has a penchant for shooting people in the gut with arrows? The reason Felicity's autopsy showed a weird angle of entrance was because Tyrion's a midget. And the increased force behind the arrow was because Tyrion was firing a crossbow.
  • Harrison Wells: The reason for the angle of entrance was because Harrison was sitting in a wheelchair. The force behind the arrow was because Harrison was using a hi-tech bow from the future.

  • Surprisingly, all Jossed. We learn in the mid-season finale, "The Calm", that it was Thea, drugged by Malcolm, with no memory of it. Maybe. Okay, it's not surprising that Tyrion was Jossed.

Sara will be revived via Lazarus Pit before the end of Season 3
.Based solely on the fact that Caity Lotz has been confirmed to have a role in a newly-planned spin-off series.
  • Jossed, she's not revived at all during Season 3 but in the spinoff Legends of Tomorrow, she is confirmed to be returning via Lazarus Pit as the White Canary.
  • S4 She's revived in Season 4, although she's suffering from bloodlust.

Barry will save Sara with time travel
Ollie has made certain that Sara's death will never be avenged, so why not avert it entirely? Considering the mess that Season 3 has been all because of her death, if Barry goes back and saves her, the entire disaster will be averted and Arrow can finally get back on track.
  • Jossed. Arrow S4, Lazarus Pit

The Earth-3 Black Canary is Dinah Drake Lance.
We saw from the season 2 finale of The Flash 2014 that Earth-3's Flash is the real Jay Garrick, who is Henry Allen's doppelganger. So it appears that Earth-3 is a world where superheroes first emerged earlier, and are now older. Earth-1's Dinah Drake Lance is not a superhero, but we know from Doctor Who that Alex Kingston can do action — it seems like a waste if the character's Earth-3 doppelganger doesn't appear as that world's Black Canary. Or at least as its first Black Canary: the mantle was passed down from mother to daughter in the comics, so perhaps Earth-3 Laurel could succeed her.

If the Black Canary returns to the show as a main character, she'll be Laurel Lance's Earth-3 doppelganger.
Semi-related to the above entry. In the pre-Crisis comics, the Black Canary was originally from Earth-Two but chose to start a new life on Earth-One. In the show, now that Earth-1 Laurel is dead, if they ever want to revive the character then the way they'll do it is by bringing in the alternate-reality version from Earth-3 (which is a world with older superheroes like the comics' Earth-Two). At least, this is probably a more likely solution than a Cosmic Retcon. And perhaps the Earth-3 doppelganger will also go by her first name Dinah, like the comic-book character, instead of by her middle name.


Thea will be Killed Off for Real and Roy takes her nickname in her memory
  • Dark.
    • Thea has been kidnapped by Slade... bad omens. Also, Ollie has already mistakenly called Roy Speedy (treating him with the same regard as he had his sister).
      • Ollie was at a grave, this will be Thea's fate (though we're meant to think it's Felicity.
      • Sara has been Pitted. She'll have to kill Thea to regain her sanity.
  • Clearly Jossed. As of Season 5, Thea is still alive and Roy's no longer on the team. Even when Roy was on the team he went by Arsenal.

Thea will save Oliver's life in her first appearance as Speedy
Because it would be awesome.
  • Jossed. She's Speedy, but she didn't save his life.

Felicity will become Speedy.
She's secretly badass. That's why she wears the loose blouses - to hide her physique.
  • Jossed. Thea is Speedy, Felicity is now called Overwatch.

Speedy won't be Arrow's sidekick. It'll be Arrowette.
And heck, for kicks and giggles, it'll be Rose Wilson AKA Ravage AKA Slade Wilson's daughter.
  • Jossed. First it was Arsenal then Speedy.

Thea joined Malcolm at the end of Season 2
because she is planning to betray him.She will take his training, become the show's version of Green Arrow's sidekick "Speedy", and bring him to justice.
  • Jossed. There will be no justice.

It won't be Thea who'll become Speedy, but Mia Dearden.
Since Dearden was Moira's maiden name, she would be Oliver's cousin who may serve as a foil to Thea after her heel turn, then join Team Arrow.
  • Jossed. It is Thea. Thea is the show's version of Mia Dearden (she takes an alias of Mia at one point as a nod to this, and still has the name Dearden as her middle name).

The Lazarus Pit may do something to Thea in the lines of what it did to Roy in "Seeing Red".
Since the Lazarus Pit in the Comics show that people brought back suffered brief insanity, her recent actions may pit her against her team in later episodes.
  • Confirmed. Thea suffers from Malcolm refers to as "the bloodlust."

Slade Wilson's son will eventually become Jericho.
This one seems kind of obvious, but this troper figured that it needed to be said.
  • Due to the series being Low Low Fantasy, he'll become The Voiceless as a result of the trauma over his father's death.
    • Jossed his son has taken a different path.

Slade Wilson will die, probably in a Heroic Sacrifice.
That's why Oliver has a hair cut similar to that of Slade. Incidentally, if ever Deathstroke does appear in the present, its gonna be a different person.
  • Billy Wintergreen is probably still alive. After all, he only had one of his eyes taken out, which is possibly survivable.
    • Possible, as Deadshot survived a mid-range arrow to the eye.
      • Jossed more or less, Slade's the big bad of season two.

Slade will eventually suffer Sanity Slippage and turn on Oliver
  • He wants to leave the island a lot, so it's possible that eventually he'll be so desperate to leave that he'll accept an offer by Edward Fyers to join him, leading to a fight with Oliver. Ollie will lose the fight, but escape death as Fyers gives Slade his promised ride home, reuniting him with his family, only for them to be unwilling to accept him after he's been gone for so long. He'll become an assassin to vent his frustrations and anger out, eventually coming to Starling City to kill the vigilante. The episode that has this even will be split in two, with the island section dealing with Slade turning on Oliver and escaping, with Oliver trying to fight modern day Slade, now known as Deathstroke.
  • In "Identity", he saw Oliver and Shado bathing together...
  • Seems, mostly confirmed. He wants to put an arrow through Ollie's eye as revenge for Shado in the present day as of the mid-season finale

Slade doesn't actually turn evil.
That's too obvious. Instead Shado is the one who turns on the Island gang and shoots Slade through the eye. Ollie doesn't take the mask down on the island because it reminds him of the cost of failure. Slade ends up amnesiac on a different Island on the chain and only regains his memory and escapes halfway through season 2.
  • It may possibly be jossed, as we've seen what happens in "Identity" and "Broken Dolls". And also the "Three Ghosts"
  • As of the mid-season finale, Slade has taken the freighter and is now an enemy to Oliver.

Slade won't become a 'villain' until the present day.
The mask seen in the pilot episode was Wintergreen's; Slade managed to get off the island before Oliver did (there might have been a scenario where there was an opportunity for only one of them to leave {example: a plane on the island only had enough fuel for ONE more passenger}, Oliver told Slade to go ahead and take it, wanting the man to be able to get back to his kid/kids). Chances are he'll show up at the end of season one, he and Oliver will greet each other like old friends...then at some point in Season 2 it will be revealed that Slade has been working as an assassin-for-hire, due to him being unable to adjust back to civilian life (just like how comic!Slade was after he was discharged from the army). Oliver will have a problem with that (perhaps Deathstroke will have been taking jobs from people on 'the list'), and a conflict between the two will ensue.
  • Looks like he's halfway there, except he started on the island AND he's the real Big Bad for S2
  • Jossed.

Slade will cross the Moral Event Horizon in the Second Season.
And it involves Sara/Black Canary somehow. She did ask if Ollie about Slade. OR
  • Confirmed. Shado's death happening due to Oliver stopping Ivo from killing Sara's putting him over the edge

Slade becomes intimate with Sara in the Island.
Exactly what it says on the tin. Maybe Slade's jealousy and resentment helps him bond with Sara or something?
  • Seems Jossed as of 'Three Ghosts'

Deathstroke's regeneration will appear
First of all, we know that Ivo is carrying out research to 'save the human race'. What if this research involves protection against injuries, like, for example, regeneration. And if Sara met Slade later on, what if he became a part of that experiment? The answer: the origin of the true Deathstroke.
  • Almost definitely confirmed; Ivo is looking for a WW2-era Japanese experimental super soldier formula which enhances the body's physical capabilities and healing abilities. After Sara describes what Ivo's looking for to Shado and the currently seriously injured Slade, Shado asks if it could help Slade. Think its only a matter of time before Slade ends up taking the formula and becomes his classic self. Assuming this is true, Slade will likely go on to escape the island and become his traditional self.
  • Partly confirmed in "The Scientist" and "Three Ghosts". In the former he seemingly dies after Oliver injects him with the Mirakuru serum. At the end of "Three Ghosts" he comes back to life, his burn wounds from the mortar perfectly healed. If it wasn't clear to viewers already, the regeneration is further supported by Roy's arrow injury vanishing after he survives his own (unwanted) Mirakuru injection.

Slade will get his own spin-off show
If DC's method of introducing The Flash is successful then they'll do the same with Slade. he'll have a day in the limelight episode of after he got off the island. He would have stumbled onto some kind of research facility experimenting on kids to turn them into meta-humans. he'll save them and they'll start working together to find out more about who captured them, creating this universes version of the teen titans, combining Slade's villain team and the heroic ones from the comics.
  • Not likely.

Slade will be hit with the Mirakuru cure, but it won't cure him completely
He'll still be stronger, faster, and all that, but he won't be quite as strong as he is now, more of 'just beyond Oliver's ability' level strength, but it will remove his hallucinations and numb his psychological problems, which will make him let go of his obsession, though not his grudge, with Oliver.
  • Jossed. It cured him, but not his hatred and obsession with revenge. As he said, it wasn't the Mirakuru that made him hate Ollie.

At some point in the future, Slade and Oliver will be forced into an Enemy Mine situation
And given their shared history, it'll be one long Moment of Awesome.

Slade's going to be Killed Off for Real or suffer a case of Chuck Cunningham Syndrome
Deadshot's recent death was apparently because, with the upcoming Suicide Squad movie, the character is now off-limits to Arrow. Deathstroke is rumored to make an appearance in the film as well. Perhaps he'll pull a Redemption Equals Death, or simply remain locked away on Lian Yu and never be spoken of again.
  • The second guess is more or less confirmed. Guggenheim has revealed the rights to Deathstroke are tied up with another DC project, and so Slade won't be returning anytime soon.

Slade will return in Season 4 as The Dragon to Damien Darhk.
Deathstroke originally worked for H.I.V.E in the comics, and this could give Oliver a personal stake in the conflict with Darhk.
  • It would also makes sense. For all we know, they were the ones who actually rescued him after his battle with Oliver (in the AMAZO). Heck, Slade may have even joined them already (after the aforementioned rescue). After all, he is super rich when he showed up in Season 2's present day.
  • Jossed. The Dragon is Malcolm Merlyn.

    Roy Harper 
Thea will die and Roy Harper will be introduced.
Roy Harper will be a young orphan who's parents were killed by someone on Ollie's list. Roy knows the vigilante is tracking down and killing corrupt businessmen, so he runs away from his foster home and spends his nights looking for the vigilante. One night he spots him because of dumb luck and follows Ollie back to the warehouse, where he see's Ollie without his hood. Ollie sees a lot of himself in Roy, and Roy threatens to expose him unless the vigilante helps him, so he takes Roy on as a sidekick and trains him so Roy can be the one who takes down the person who killed his parents. Thea has died in a previous episode for some reason, possibly drug related, or getting in the way of a bullet meant for Ollie or the vigilante, so Ollie gives Roy the codename Speedy in honour of his beloved sister.
  • Possibly Jossed with the casting announcement of Roy Harper, and Roy being a Love Interest for Thea.
    • Its possible that they'll fridge Thea as a way to push Roy into joining Oliver's crusade. Maybe, she'll die due to the course of a season Big Bad (maybe Malcolm, maybe Season Two's bad guy), and the follow-up season will deal with Oliver and Roy both dealing with the loss of her, eventually making the two support one another as they work together to bring in her killer.
      • Jossed - Roy joins up without Thea dying, partially to keep her safe from his Mirakuru issues.
    • Thea has been kidnapped... bad omens.
      • Thea's fine. However, Roy lying to her has driven her away once and for all.

Thea will be murdered and Roy, after having fallen in love with her, will go on a Roaring Rampage of Revenge.
The Dark Archer finds out Ollie's secret identity and attacks the mansion. Ollie is able to save Moira, but Thea is killed.Since Roy is so young, despite Oliver wanting revenge for his sister, he will disapprove of Roy becoming a murderer and will try to stop him while taking him under his wing. Wanting to set a good example for Roy is what causes Oliver to give up killing and start working to being the non-murdering hero figure he is in the comics.
  • It could still happen, but this particular theory seemed to have been Jossed.

Roy Harper's heroin addiction will still be present.
Although Thea seems set up to be the drug-addled sidekick, it's possible that Roy will also take drugs, only harder ones. Similar to his comics-counterpart he will be heavily addicted to heroin. This will destroy him so much as a person that it will cause Thea to finally give up drugs, and convince Roy to go to rehab.
  • This could explain why he is afraid of needles. It would be understandable that someone who was trying to give up an addiction would have an aversion to something that reminded them of it. Seeing that might even cause him to take up the habit again.
  • Likely Jossed. If Roy had a heroin addiction, it was never shown on-screen and now Roy's no longer on the show (barring special guest appearances).

Roy will teach Thea how to shoot
  • Jossed. Malcolm does.

Roy will become a vigilante independent of Ollie, using red arrows
Which will lead to the SCPD nicknaming them Red/Green Arrow respectively, to distinguish between the two - Detective Lance already made the note that Dark Archer used black arrows instead of Ollie's green.
  • Possibly merging the above theory, Roy will start off as an outright Robin Hood, robbing the rich regardless of their morality to support his daughter and himself, and is purposely using his MO to hide who he really is and make it appear its just 'the Hood'. He at first tries to justify himself and make a "Not So Different" Remark speech, resulting in Olly instead revealing who he is and training him, while recruiting him to his cause. They'll argue and disagree but they'll grow to be like brothers.
    • Partially jossed, Roy tries to make it on his own and almost kills a man and joins Team Arrow so Oliver can teach him how to control his anger.

The reason Roy was hesitant to get that needle was because he's a recovering drug addict
Instead of heroin it'll be Vertigo, just because, and he sobered up to look after his daughter Lian, who Thea will help him take care of once the two finally warm up to each other proper.
  • In terms of Lian, jossed. When the Savior is preparing to kill him, Roy simply accepts his fate, citing that no one would miss him. Not something a single father would say unless she is in protective custody away from him.

Thea and Roy will become Artemis and Arsenal respectively
  • It would make sense that Thea would somehow learn her brother's secret identity and try to close the distance between them a la Danny Phantom. Even more likely with her love interest primed to become part of Ollie's fold. The title "Speedy" is thrown around as a mythology gag and "Arrowette" probably wouldn't work for a darker show like this. Plus Alliterative Trio (Arrow, Arsenal, Artemis).
  • Confirmed for season 3. Roy will be known as Arsenal.
  • Jossed for Thea. Thea becomes Speedy. Evelyn Sharp becomes Artemis in Season 5.

Thea, and possibly Roy, have figured out Oliver is the Hood
Oliver's promise that Roy will be be saved, right before the Hood saves Roy, is just a tad suspicious, and as Thea already had some suspicions thanks to the arrow head, she'll check up and find out his story about getting it from a gift shop was a lie. Roy, meanwhile, when he finally actually meets Oliver, he'll click on who he is, possibly going from some things Thea has said.
  • So far doesn't seem to be the way their going with this, as Darkness on the Edge of Town has Roy meet Oliver out of costume for the first time with Roy telling Thea behind Ollie's back that he believes Ollie's a wimp. (Thea wasn't amused by this comment.)
    • Jossed for Roy, at least, Oliver finally tells him to get him to calm down at a crucial moment by reinforcing the fact that they both love Thea.
      • Jossed for Thea as well. She does not find out until Oliver personally tells her in Season 3.

Roy already knows how to use a bow.
Though he wasn't using a bow at the time, he was surprisingly accurate when he threw that broken red arrow at Oliver in that alleyway in Season 2 Episode 2, "Identity". He's also quite skilled for his age, being able to take on a group of thugs by himself. This suggests that he already had prior training before his introduction into the series. In the comics, Roy was the son of a forest ranger. After his father died, he was adopted by Brave Bow, the shaman of a Navajo reservation and raised as a member the 'Tachini' tribe. It was only after Brave Bow died that Green Arrow took him in as his ward. It's possible that the Arrow-version of Roy Harper has a similar back story and was taught archery by a Native American during his childhood. In "Darkness On the Edge Of Town", he mentioned that he lost someone, but didn't say who. If this someone was actually the Arrow-version of Brave Bow, then everything falls into place. This would also mean that Oliver won't have to spend years training Roy, since Roy already has a foundation to work off of.
  • Jossed.

Roy will get his hand cut off.
And end up with a prosthetic that may or may not come equipped with a laser cannon.
  • Jossed as of Season 4. And since he's no longer a series regular, likely jossed entirely.

Roy will go to Blüdhaven now that he's left Starling
And he'll meet Nightwing, who will give him some advice about mentor/protege relationships and convince him to go back, because running away from your problems doesn't solve anything.
  • Confirmed mostly, he was in Blüdhaven when Slade and Isabel found him.

Roy will be cured of the Mirikuru
And due to both his own guilt for the people he hurt and killed under his rampage and Oliver's for causing all this, Ollie will take him under his wing once more and train him to be Red Arrow, properly.
  • Confirmed "Unthinkable." He learns this the hard way.

When/if Roy returns to Starling
He will have already met Cheshire and fathered Lian.
  • Hasn't happened the first time he returned, but it could happen later.

     The League of Assassins 

When Ra's Al Ghul does show up on Arrow, he'll actually be immortal like in the comics
  • In the Batman films, his immortality is due to being a Legacy Character, but in the comics, it is the Lazarus Pits that keep him alive. Perhaps, with super powers being introduced to the show in season two, Ra's' comic-book immortality will be intact.
    • Confirmed, Ra's is hundreds of years old and prolongs his life through use of the Lazarus Pits.

Malcolm's revival
It's already growing pretty obvious at this point: there is a Lazarus Pit. Malcolm DID die at the end of season 1, as even Moira believed he was dead so there was a formal autopsy report confirming it. It may have been doctored, but his using "immortality" was on the nose. Malcolm died, his death was formally confirmed, the League took back his body, and they used the Pit on him.
  • We don't yet know how/if he was revived, but Malcolm is back!
  • Doesn't seem like Ra's revived him, as he wants to KILL him himself. Most likely, he never died.
  • It could be H.I.V.E who revived him. Ra's himself said that they also have a (limited) pit. Plus, their leader, Damian Darhk, was an ex-member of the League like Malcolm, so it would make sense if they're in cahoots.
  • There have been no indications whatsoever that Malcolm was revived. Its most likely the case that Oliver simply didn't finish Malcolm off and Malcolm recovered and managed to slink away.

Malcolm will try to get the League to revive Tommy too
Malcolm will try to use a Lazarus Pit to revive Tommy at some point, but, if successful, would result in turning Tommy insane and evil by the after-effects of the Lazarus Pit. Oliver will have to choose between letting Tommy be revived, or leaving him dead so his memory won't be perverted.
  • So far seems Jossed. And based on Malcolm's reactions to reviving Sara in the pit, it seems incredibly unlikely he tried doing it for Tommy.

Malcolm Merlyn is dead.
Though it would appear he survived his apparent death at the end of season one, the only person he's really interacted with is Moira. What if he really did die, and his subsequent appearances are Moira's guilt-induced hallucinations?
  • Jossed as of "streets of fire" he saves Thea from some of Slade's soldiers.

The central plot of Season 3 involves a civil war within the League of Assassins.
Just as in the comics, Nyssa leads a faction of the League against her father, Ra's al Ghul. Presumably, she wishes to take over the League and remake it into a less extremist organization. This may well be the reason why she agreed to help Team Arrow stop Slade in the Season 2 finale, and why Sara agreed to return to the League (which many found jarring, because Sara's arc in Season 2 was one of redemption and trying to get over her violent past). This civil war within the LOA, and its implications for Starling City, will be the over-arching story of Season 3.

In the season premier, The Calm, Sara, just before she dies, tells Laurel she's back in Starling City for a reason she refuses to talk about. Immediately thereafter she is killed by someone she knows, who is definitely a League member. My guess is that Sara came to Starling for some mission that furthered Nyssa's plans to take over the League, and that one of Ra's loyal assassins found out her attempted betrayal and killed her.

This will bring Nyssa back to Starling City, and lead her to ally herself again with Team Arrow as recent promotional material suggests.

  • Sadly Jossed. Nyssa does have conflicts with the League and there is a Civil War, but officially the Civil War is a by-story in Season 4 rather than a central plot of Season 3.

Laurel and Thea will join The League.
Let's face it, Ollie has proven he doesn't care about anybody but Malcolm, so there's no reason for them to stand by his side when he's proved he'll throw everybody else under a bus. On the other hand, The League, while not perfect, can give them the skills they'll need to punish criminals. For Laurel, she'll be honoring her sister's legacy. For Thea, it's the ultimate middle finger to her scumbag father and step-brother. They have nothing to lose, and can't trust Ollie anymore, so it's the most sensible action.
  • Ignoring the fact that Ollie has not 'proven he doesn't care about anybody but Malcolm' and he's mostly motivated by wanting to protect his sister (and while he's being a dick, treating it that way is blatant Ron the Death Eater), the League are currently attacking the city in order to punish Oliver for the 'crime' of refusing to join them, meaning that joining the League would be a Face–Heel Turn. Not to mention, Sara hated being with the League, so Laurel joining them would be the exact opposite of 'honoring her sister's legacy'.
  • Jossed. They aren't joining the League.

Identities of Ra's Al Ghul's pre-LOA family.
  • Wife: Sora from Birth Of The Demon
  • Daughter: Talia
  • Son: Dusan

Actually the true heir will be Thea
  • Thea also survived Ra's blade and could even become his heir and possibly Talia Al Ghul.
    • Jossed. The league has been disbanded halfway through Season 4.

"Ra's al Ghul" was actually Ebeneezer Darrk.
  • This version's name was Ebeneezer Dahrk, and was Damien's brother. He told Oliver that Damian was a friend because he's given up his ties to his past life. He acted as Ra's decoy so that the original Ra's could run the Demon in secrecy.

     Other Villains 

Amanda Chen is Fyers' employer.
She's mentioned multiple times but never seen. On top of that, it's mentioned that she was raped in the Glades. Her rapists were probably Triad members, which would explain her want of destruction to China.
  • Jossed. It was Amanda Waller who was his boss.

The Organization is a forerunner to the Secret Society of Supervillains

The Secret Six will appear as antagonists and eventual AntiVillains.
Their roster of morally ambiguous Badass Normals (mostly normal) will mesh well with the Arrow aesthetic.

The person who compiled the list is Mr. Merlyn
He was among the first to realize that "Green Arrow" is targeting the list.
  • Also, he seems to be running the whole organization.
  • In "Damaged" Moira specifically calls him out for trying to have her son killed.
  • As the evil archer he tells Ollie that the person who compiled it wants "Green Arrow" dead.
    • Confirmed - the list was a blackmail list of the city's worst and most corrupt criminals that Malcolm Merlyn and other elite people were using to "stop" crime. And then they wandered into mass murder territory, still using the blackmail list to fund their...endeavors.
This troper feels like there could be one, but he's not yet sure who it would be. Assuming that Malcolm didn't write the list, the Greater-Scope Villain could be whoever did.
  • Some of the things said by Malcolm in "Dead to Rights" it seems to suggest that the Demon's Head may be pulling the strings.
  • Adding to this, activity in the island may be part of it all.
  • Possibly half-confirmed with the mysterious woman appearing in the flashback in "Darkness on the Edge of Town".

Edward Fyers is somehow tied to the list.
He probably didn't write it, but he may be working for Malcolm. Or, if the above WMG is correct, he could be working for whoever wrote the list. Either that, or he has his own agenda, and he's controlling the person who composed the list.

Bits of Malcolm Merlyn's back-story will be shown in flashbacks.
By doing this, they can work in the League of Assassins/Shadows, since it's tied to his background.
  • This seems to be supported by Malcolm's explanation for leaving Tommy in "Dead to Rights".
    • Confirmed. A flashback of Malcolm's "first kill" has since been shown.

Malcolm Merlyn/The Dark Archer will pull a No One Could Survive That!
He is played by John Barrowman/Captain Jack. It'll probably also be combined with Never Found the Body.
  • Confirmed.

Billy Wintergreen is still alive and will be THE Deathstroke, and kill Slade.
Slade survived the island and is apparently a Big Bad in a bad way. While Billy is dead as doornail.

Sebastian Blood is the Big Bad of season 2, and Ollie will have to end the masquerade to defeat him.
Blood is secretly in charge of a conspiracy to use the Glades' destruction to cause a massive riot that will destroy the rest of the city, and is using Lance's superior and the DA to tear down the heroes and present the Undertaking as a preemptive strike in class warfare that needs to be avenged. Thus, Lance, despite saving half the Glades, is demoted and neutralized by the police department, and Moira, despite revealing the conspiracy and acting in full cooperation with the authorities, is being demonized and persecuted in an attempt to make a planned hung jury tick off the surviving Glades residents. Blood genuinely believes in the strike back, and is likely affiliated with a certain terrifying Greater-Scope Villain that Malcolm answered to...
  • Secondly, this will leave Oliver with the dual goals of stopping Blood and rescuing his mother. The latter will unintentionally help Blood's plan, and in order to stop the former, Oliver will use the one iconography that Blood can't quite taint: he'll unmask himself and become the Green Arrow, who people do know put down Malcolm Merlin and helped save half the Glades.
  • While he's a Big Bad, He's working for Slade Wilson, the Greater-Scope Villain
    • Jossed. Blood was nothing.

The Big Bad in a future season will be...
  • Steelclaw
  • Reverend Billy Miggs
  • Count Vertigo, who will conquer the vertigo side effects.
    • Very much confirmed. He'll be back and making a stronger version than before, but he won't be a Big Bad.
    • Very much jossed as he's now very much dead after getting arrows put through him by Ollie and dropped out a window.
  • Isabel Rochev
    • It definitely looks like she'll be the Big Bad of season two.
      • Jossed. Looks like Slade is the Big Bad of S2.
      • though she is working with him.
      • she dead now
  • An Expy of Ra's Al Ghul
    • There's a possibility that it could be the man, himself. Although Nolan's The Dark Knight Trilogy has made him more well-known to the mainstream, he's still a DC property, so there is no reason why he could not make an appearance on Arrow. He'd likely be played by another actor, with a different interpretation of the character, but he does not need an expy.
    • Confirmed. The Demon's Head is definitely in this world and may serve as one of the Big Bads of the season, if not a recurring one.
  • Daniel "Brick" Brickwell.
    • Confirmed. He served as an Arc Villain for the first three episodes after The Climb.
  • THE Deathstroke, be it Slade Wilson or Billy Wintergreen.
  • Rainbow Archer/Arrow Raiders
  • Cherry Noller/Four Horsemen
  • Professor Ojo

Trigon the Terrible will show up
We got Brother Blood so why not? He would be more subtle, like showing up at scenes of a murder, stalking Oliver then vanishing. He wont be obvious but we will know... and he will be flat f**king terrifying.
  • He will be more a guardian angel in the worst sense to Ollie or the bad guys.

We will see more Suicide Squad members
We've already been introduced to Deadshot, Bronze Tiger, and Amanda Waller. Dr. Light might appear in a future episode.
  • Also Ted Gaynor, Diggle's former C.O. confirmed for the Suicide Squad.
  • Shrapnel was shown in "Suicide Squad" before being "popped" due to an explosive implant.

Thea will not become Speedy, but the new Dark Archer
With Malcolm revealed to be her true father, her new obsession with discovering who the Arrow is, and her tendency to walk a sometimes dark path, I don't see this as being too farfetched if Malcolm manages to reveal himself to her, corrupt her, and train her.
  • Or, alternatively, through the training, she becomes Cheshire, which compliments her romance with Red Arrow.
    • Jossed. she's going to die.
      • This response is Jossed. She's alive and well and becomes Speedy.

Prometheus will show up.
He fits the atmosphere of the show, and would be an excellent opponent for Roy now that he's powered by Mirakuru. Maybe he'll take Roy's arm, and if they really want to please the comic book fans they could have Roy kill him (as a kind of meta-revenge).
  • What if Roy is Prometheus?
  • Confirmed. Its not the same Prometheus from the comics, but Prometheus is a major/the main antagonist in Season 5.

Brother Blood will betray Slade.
As shown at the end of "Blind Spot", Slade killed four of Blood's men and threatened to kill him if he messes up again.
  • Confirmed in 'Streets of Fire', he handed over the Mirakuru cure to Team Arrow and was killed by Ravager as a punishment.

The Joker will show up to break Harley Quinn out of prison
Because as much as she gets on his nerves sometimes, nobody bosses his girl around except for him.
  • Or not. This could be an alt Harley with little to no connection to the Joker.
    • ... which changes so many things about her that by that point she wouldn't really be Harley Quinn anymore.

Dr. Ivo asked for a Mercy Kill because he's unable to save his wife.
From their conversion in "The Promise", her illness may have gotten to the point where it can't be cured.

Cheshire will turn up at some stage
In the comics and Young Justice (2010) she had connections to Roy, plus a martial-artist with a side order of chemical warfare would fit in with the tone of the show fairly well.
  • With Evelyn Sharp becoming Artemis in Season 5 and Roy confirmed to be back as a special guest star at some point, plus this basically being the "Vigilante" season, Cheshire might be more likely to show up in Season 5.

Another reason Robert Queen stayed with his family is because Isabel Rochev was always a bitch.
He sees she wasn't the woman he assumed or she let on. But she blames his family for losing Robert.

Ray Palmer and Amanda Waller's actions will lead to the creation of Brother Eye.
At the end of "Corto Maltese" we see Ray Palmer examining blueprints of military drones labelled OMAC. OMAC drones are usually designed to fight metahumans, and after the events leading to The Flash, ARGUS is going to want some way to manage the growing metahuman threat. Amanda Waller has already shown a preference for using drones, and will wind up putting too much in the hands of the OMAC system before it goes full Skynet.

China White will end up breaking out of whatever jail she's in and seek revenge on Team Arrow
She hasn't been seen since season 2, though once she sees Ollie on TV fighting, she'll remember a particular way about how he fights that makes her realize who he was during his time in Hong Kong.

Malcolm will continue to be a Karma Houdini
Despite all of the evidence of him being a monster, Ollie continues to defend him and let him slide and now he's even picked a fight with Ra's to defend Malcom. Putting all of the evidence together, this shows that Ollie will continue to find reasons to save and protect Malcom from ever having to pay for his murders and the death of Sarah.
  • Confirmed: Ollie is now buddies with Malcolm and he is going to be training with him to fight Ra's.
    • Technically, Malcolm has suffered karma in the death of Thea. sure she gets resurrected... but she's going to die again anyway.
      • Thea's still alive and fully cured of her bloodlust. However, he did lose Thea; she refuses to have anything to do with him after the death of Laurel.
  • As of the end of Season 4, he's completely alienated from the team and they want nothing to do with him. He hasn't been strictly punished, but the team is absolutely unwilling to be friends with him anymore, and he's back to being a major antagonist on at least Legends of Tomorrow.

Deadshot isn't dead
The way the episode ended, it could end up being a case of Never Found the Body. With his death faked, Lawton gets his kill chip defused and he's able to go back to his business.

The Hive will be the main antagonists for Season 4
  • Somewhat confirmed. The main antagonist so far is Damien Darrk but he's under orders from the Hive.

    Other Characters 

Thea will get HIV from a dirty heroin needle.
You know its coming.
  • Probably, but alas, Science Marches On. HIV is no longer the death sentence it was when the story was originally written. Terrible to be sure, but less impacting perhaps.
  • One could argue probably not as well. It seems unlikely on a TV show.
    • As of season two, Thea is clean and sober and running her brother's bar. The fall from grace seems to be Laurel's issue.

Connor Hawke will make an appearance
Although since Oliver's too young to be his father, he might end up being Oliver's half-brother—and Oliver will be a Big Brother Mentor to him rather than his father.
  • This could be a possibility. Moira claimed her husband was not who they thought he was.
  • Perhaps Connor will become Speedy.
  • Oliver is confirmed to have an illegitimate child as of "Seeing Red".
    • In the comics, Connor is multiracial and in the show, the mother of Oliver's child is Ambiguously Brown.
      • However, its confirmed Oliver's son is named William Clayton.

Diggle will become Arsenal.
  • In the Suicide Squad episode, he was referred to as Freelancer, though that's a generic title.
    • Well, he's got a "mask" now. Still no codename.
  • Jossed. He's going by Spartan. Arsenal was Roy in Season 3, anyway.

The Question (Vic Sage) will make an appearance.

Blue Beetle will show up as a foil
There are plenty of other billionaire vigilantes in the DC Universe; however, Ted Kord could be set up as a good foil to Ollie. Ted could be a serious businessman in his civilian life, reviving his company after his father's breakdown and trying to make amends for what his uncle did. Meanwhile, Ted uses his renown engineering skills to make himself weapons and vehicles to be a vigilante of the Thou Shalt Not Kill breed. This will serve to highlight the differences between the two, as Ted will be more friendly as a vigilante than he is in his civilian life.
  • They seem to be doing this with Ray Palmer/The Atom

Similar to the above, most of the cast will eventually form into the shows version of the Arrow Family
  • Laurel will become Black Canary, obviously, but more like the original Golden Age or Grell version, a Badass Normal without her Canary Cry, after taking a few more levels in Badass.
    • It's Sarah.
    • Nope. She's dead. She was just the Canary. Laurel will become the Black Canary in her memory.
    • Nope again. Laurel's killed to pander to olicity fans/contribute to Oliver's man-pain (maybe both).
      • If this was the case, Oliver and Felicity would've gotten back together already. Its likely they won't get back together at this rate.
  • Thea will become Speedy, after taking lessons from Ollie.
    • but then she'll die.
      • As of Season 5 Thea is alive. However, Thea learned from Malcolm and not Ollie.
  • Roy will become Red Arrow after being officially adopted into the family as a surrogate little brother, and will incorporate his street skills into it.
    • Jossed, he becomes Arsenal.
  • Diggle will become Arsenal, after no Levels of badassery being taken, just him doing more physical work.
    • Thought Roy was Arsenal... wiki says so.
  • Tommy will eventually side with Ollie against his father, take a level in badass, and become a good version of the Dark Archer, or possibly the above suggested idea of becoming Question.
    • Tommy's dead.
  • Connor Hawke will come in, re-imagined as an illegitimate brother (assuming Moira was telling the truth about her husband's affairs).
  • Huntress will return, cooling down a bit and reconciling with Ollie and possibly teaming up with Tommy!Question.
    • Tommy's dead.

McKenna is Arrow's counterpart to Renee Montoya.
Even if she isn't a lesbian, it could work well. She's not a detective, but she works in vice, so she's used to digging up information on crimes. Something could happen that could inspire her to become a vigilante.
  • She may have experimented in college, or she could be bi or pan in this version.

Felicity will decide to get fat.
Not necessarily right now (and honestly, this is unlikely for as long as the show airs) but at some point, Oliver will admit that, after being stranded on a desert island, struggling to survive, he started to fantasise less about the stereotypical slim girls he used to date and more about obese women, whose large bodies could only have been grown from lots of easy access to food. Felicity decides to use this as a way to get even closer to him and give him exactly what he wants, while seriously indulging herself, as well. She gets very fat.

Since Yao Fei exists, various other re-imagined members of the Great Ten will show up.
Someone like the Celestial Archer would fit in nicely.

McKenna will become pregnant.
In a later season, she will give birth to Oliver's son, who, in the show, will be renamed "Connor Hall".
  • She's never showed up again.

Felicity will become... someone.
Who she'd be is not yet certain, but she could possibly take up an identity as some sort of vigilante in later seasons.
  • Arrowette would be one possibility. Arrowette would be more adaptable with less iconic baggage than Speedy (already given), Canary (already given). Arsenal would be interesting though highly unlikely. Oracle perhaps though that might tread too closely to Batman. Though at the very least, the fact that she might become someone seems more likely since we're shown a short scene of Diggle training Felicity in hand to hand combat.
    • Felicity has been fishing for a codename. Despite Diggle still not having one either.
      • Felicity is given the name Overwatch in Season 4, but after Diggle gets Spartan (by Felicity).

Felicity and Diggle will become a couple.
And we'll be treated to them attempting various dates only to inevitably get caught up in Ollie's vigilantism requests.
  • Jossed.

The real reason Laurel's mom left is because she's been searching for Sarah.

Lian Harper is alive
And is the reason Roy made up a sob story about his mother being addicted to Vertigo - If he said he was trying to provide for his daughter, SCPD would have her taken into care.
  • That idea is so great I hope its canon.
  • Damn, its been Jossed as of Salvation. He's shown with Thea in his apartment with no sign of any children, and later while held by The Savior, Roy claims no one will miss him, something he'd be unlikely to say if he had a daughter. Still, its possible that she may be brought in as a child he didn't know about until Cheshire, or a new in-universe mother, shows up and dumps the child on him.
    • Or perhaps, he adopts the child when Cheshire abandons her.

Laurel's mom will be killed off.
Someone knows about Sarah's survival, and will kill Dinah, so that the information won't spread. This would be because Sarah knows something that could put The Undertaking at risk.
  • Jossed: Sara knows absolutely nothing about The Undertaking at all.

After Oliver went for a kill shot at her, Helena will...
Either take it as a wake-up call that she's gone too far and work to redeem herself as a legitimate vigilante who only kills when needed, OR, she'll be spurred by his 'betrayal' and come at him again later, once her dad is definitely dead or out of reach.
  • If the latter, at some point she'll mention McKenna's injury to push his buttons.
    • Also about how he failed to prevent the Undertaking, and his family has now become the most hated in Starling.

The hostage-taking vertigo junkie in Ep. 19 was actually Aquaman
Not only was the junkie sporting a bushy beard, he was attempting to find solace in the city's aquarium. He was clearly talking to the fishes, but when the girl insulted him, he snapped and took hostages. This was obviously because Aquaman had become so fed up with people insulting him and calling him lame, evident by his yells of, "Don't laugh at me!" Furthermore, it will later be revealed that he actually survived the overdose due to his Atlantean biology. Since Arrow shot an arrow through his right hand, Aquaman will return with a hook in its place, just like the one he had in the Justice League cartoon.
  • The junkie is actually Aquaman's human step-brother Orm (Ocean Master).

Moira wanted the salvaged yacht to be found.
That's the only possible explanation for her salvaging the "Queen's Gambit." We were led to believe at first that Tempest wanted to make sure no one salvaged the remains for investigation, because they would find evidence of sabotage. But now Malcolm wants Moira to dispose of the evidence, to make sure no one discovers it. In that case, why did Moira salvage the yacht if Malcolm thought it might lead to someone finding evidence of sabotage... unless she wanted someone to find it? By now, she's in so deep that there's no way out. But she can still leave a trail of breadcrumbs for someone to find and stop them.

Lian Harper existed in this universe but died.
In "Darkness On the Edge Of Town" Roy mentioned that he had lost someone but wouldn't mention who. It could possible be a daughter, who either died or was taken from him. This troper's pretty dark so more likely to believe it's the former but lets all hope it's the latter; Lian shouldn't have died in the comics, no need to kill her here too.
  • That 'someone' could be his little sister named Lian.

Tommy is the Joker
Based purely on how in "On the Edge of Darkness" he asks Ollie "Why so serious?". Plus, do you really think the Joker would let as little a thing as separate universes stop him from messing with a vigilante who is effective in stopping crime?
  • The Lazarus Pit exists. But Malcolm won't use it on Tommy. Maybe someone else could.

Shado taught Oliver more than just archery
She probably also taught him Yao Fei's style of fighting, presented him with the hood, and probably was also Oliver's source for learning Mandarin Chinese.
  • Confirmed more or less, Oliver wears the hood to honor her and her father, and S2 shows him learning Mandarin from her.

Super-powered characters will start appearing once the show has grown the beard a little
And when that happens, Ollie will become the eighth member of the Justice League
  • While the jury's still out on the show Growing the Beard, as it's only season 2, it has been announced that Barry Allen will be introduced in that season as a lead-in to his own spin off show. And yes, it's confirmed that super powers will be introduced through him.
  • Flash has appeared.
    • Barry Allen didn't have super powers during his stint on Arrow. Although they egged us with a shot of the accident that would lead to him becoming Flash.
  • The closest the show has to superpowers so far is the super-strength and regeneration provided by mirakuru.

Felicity has a thing for Oliver.
When she first appeared her motor mouth tended to lead to awkward nonsequitors, like the fear of kangaroos. After she began working for him, her babbling took a more sexual turn, due to the fact that she began spending her nights watching her hot boss work out shirtless. She's not in love with him, isn't pining for him, but he does tend to show up in her naughtier dreams and fantasies.
  • This is pretty much confirmed, not only by Word of God but just by the fact that's it's obvious. Felicity never seems to have those Freudian Slips around Diggle, after all.
  • Three Ghosts more or less confirms this, with Barry's phone call to her.
  • "Keep Your Enemies Closer" made this a hell of a lot more serious, and let's not go into the rest of season two and the entirety of season three... In other words, confirmed.

Thea will discover the lair by accident
Now that she runs the club, she'll inspect everything and then force her brother to train her.
  • Not how it went down.

Felicity will get a day in the limelight episode this season.
And it will focus mostly on her troubles at Queen Consolidated after being promoted to Oliver's executive assistant.
  • Technically, confirmed. Felicity and Roy are appearing in a series of 30sec episodes known as Blood Rush.

Det. Lance knows that Oliver is The Arrow
In Broken Dolls he worked extensively with the Arrow and his team. Including participating in a sting operation with the Arrow, Felicity (Oliver Queen's secretary) and Diggle (Oliver Queen's bodyguard). If he hasn't figured it out then this troper can't understand how he ever became a Detective.
  • Lance doesn't seem to be aware that Ollie and the Arrow are the same person. When Sarah reveals herself to be alive, he quickly figures out that she is the female vigilante, has been alive for weeks, and is in touch with the Arrow (he uses the word Arrow rather than Hood).
    • Well, he knows now.
    • He believed it in the first season, and when he is finally told in Season 3 he isn't surprised, it just confirmed what he theorized all along. But he wasn't fully certain that Oliver was The Arrow until Ra's Al Ghul told him.

Certain characters will make appearances from other DC properties.
With the introduction of Firefly, the possibility for additional Batman villains remains very open. They would be mostly be minor villains, most likely, but a chance remains that they might introduce a few major ones.

This doesn't just have to be limited to the villains, either. The Bludhaven reference gives way to a potential appearance of Nightwing. If he shows up a few times, he could become a rival to Arrow.

Also, despite the fact that Smallville had its own version of Green Arrow, some of its characters could make cameos, or even recurring appearances. Both shows are aired on The CW, after all. All of that being said, which characters from other DC properties would you like to see?

To make this easy, I will make a few categories to put characters in, by the property that they're from. Put the series in bold, and have the characters as bullets. Also, unless they're just that cool, try not to put in characters that would be too difficult to make realistic. If you can think of a way to make a character realistic, or to make him/her work better for the series, add a colon, after the character's name.

Batman/related properties:

  • Riddler: He could be an online computer hacker/terrorist who uses riddles as an MO.
    • They already did this general MO for Clock King.
    • Maybe Riddler will be a competitive PI.
  • Calendar Man
  • Hush
    • This troper believes the execs would save Hush's appearance for a possible live-action Batman series or another movie.
  • Victor Zsasz
    • Zsasz is fairly prominent on Gotham. Doubtful he'd also appear on Arrow/Flash. But he might show up on film.
      • With Gotham on it's final season, this might not be an issue in the future.
  • Various Dark Knights - they've already teased Red Death on Flash, and Scott Snyder (who wrote the event) has said that quite a few were left on the cutting room floor (not to mention he seems very happy about Red Death being name-dropped); they could easily use the Devastator (since Superman already exists in the Arrowverse), or they could easily create an Original Generation onenote .
  • Nightwing: If Dick Grayson doesn't become Nightwing, the role could easily be filled by a character in the show. Who, though, has yet to be determined.
    • Jason Todd will be Nightwing.
      • No, Jason Todd will be Red X.
    • So far in "Dead to Rights", Bludhaven appeared.
  • Batwoman: Without using the Bat-name, Kate Kane could appear as an army acquaintance of Diggle's, perhaps discharged from the military when she defied Don't Ask Don't Tell.
  • Renee Montoya
  • The Clock King: He was originally a Green Arrow villain before becoming Batman's. He'll be based on the Temple Fugate version, with William Tockman's backstory.
    • Confirmed. The William Tockman version of the Clock King has made an appearance.
  • Signalman: Dressed like Green Arrow, only in blue. A nod to his brief stint as the Blue Bowman.
  • Puzzler
  • Lex Luthor: He could show up as a cameo.
    • He and Queen had history in the Smallville version.
  • Toyman
  • Starman: The staff can be some form of technology.
  • Shade (the antihero version): He could have a type of technology that allows him to manipulate a substance that resembles shadows, possibly a bio-weapon.
    • This one is doubtful.
Blue Beetle:
  • Ted Kord/Blue Beetle: Ted Kord mentioned.
  • Jaime Reyes's parents.
The Question:
  • The Question: Similar to an above WMG, Tommy could take up the mantle in this version.
    • Doubtful that it would be Tommy. But as McKenna has been speculated to be Arrow's Renee Montoya, maybe she'll become the Question.
  • If one looks closely, a version of the Question is apparently among the Earth-2 criminals that was summoned to Earth-1 by Zoom in The Flash season 2.
Sandman Mystery Theatre:
  • Wesley Dodds/Sandman
Team 7
  • Various members: In this continuity, Slade Wilson is in Team 7, which, here, is an Australian intelligence unit. It's somewhat likely that additional members may appear.
Firestorm (DC Comics):
  • Since Felicity comes from the same comic, Ronald "Ronnie" Raymond could appear as well, just re-imagined as a mixed martial artist or a former boxer with the nickname of Firestorm since he works up a "firestorm" in the ring. Martin Stein could also appear as a Mickey-like figure that only appears to him like a "spirit", giving him advice and it always looks like he is talking to himself. Also Ronnie and Oliver could become Bash Brothers, with Ronnie taking an interest in Felicity.
    • Semi-confirmed, via The Flash
Green Lantern:
  • Since Hal Jordan, Guy Gardner, Kyle Rayner, and John Stewart are likely off-limits due to the Green Lantern Corps movie that the DCEU has in the works, Jessica Cruz and Simon Baznote  could show up. Baz could be a reforming criminal, and Cruz could be a caseworker/parole officer assigned to him, and some incident causes the two to get Rings. Alternatively:
    • Alan Scott: Jay Garrick could meet him off-screen and the two could be drinking buddies. Some situation causes Scott to reveal his powers.
    • Hal Jordannote ; could be an old friend of Oliver'snote  who became a Lantern during Oliver's 5 year absence; he'd be taking a vacation from his space-cop duties.
    • In Elseworlds, the Flash from the 1990 series mentioned the John Diggle of his Earth being the Green Lantern.
  • The Warlord: Travis Morgan. People will mistake him for Oliver, due to their uncanny resemblance.
  • Raven Roth: she was meant to get a show. maybe it will be after they establish the "Capes and Freaks" exist in-universe. Brother Blood will be involved.
    • Unlikely now, as she appears in Titans which exists in a separate universe from the Arrowverse and the DCEU.
  • The Monitor. The show turned Harbinger into an ARGUS agent, so maybe the Monitor will be something along the lines of a (human) information broker.
    • He will be called Bob. Which would either be his real name or an alias.
    • The Anti-Monitor: His evil twin brother. He'll be in some life-support system that resembles his comic counterpart's armor.
    • The Montiors: A secretive group of 52 people (51 men and one woman, all humans) observing everything that's going on in the world. Mostly involving superhero activity.
    • All jossed: The Monitor appears in the crossover special Elseworlds, as a cosmic being like in the comics. The other Monitors doesn't seem to exist. The Monitor mentions a bigger threat, most likely the Anti-Monitor, who will be the Big Bad in the next crossover Crisis on Infinite Earths. Harbinger serving the Monitor remains to be seen.
  • The First Wildcat, Ted Grant could appear as a mentor figure to Laurel should she ever decide to take up her sister's mantle.
    • Confirmed.
  • At least one magic user: Doctor Fate, Zatanna, Deadman, John Constantine
  • Demolition Team
    • Confirmed.

Diggle is this universe's version of Nightwing.
With the Bat-Embargo causing the exclusion of main characters (aka Bat-Family) from the Batman comics for the series, hints show that Diggle may be a suitable candidate to become Nightwing. Next to The Arrow, Slade and The Canary, Diggle is the character most often using Eskrima sticks and techniques to fight: his first training session with Oliver back in Season 1 was displayed in a scene using Eskrima drills, and in "Keep Your Enemies Closer" he picks up the stick weapon and uses it to disable the guards in the Gulag before taking the gun from Deadshot. His nickname, "Dig" also sounds like "Dick", which is Richard Grayson's nickname in the comics. He also needs a costume and a codename sooner or later, or someone is going to figure out that Oliver's bodyguard just happens to be poking around wherever The Arrow just happens to be investigating. His role as the butler/driver and sidekick to Ollie also mirrors the roles of Alfred and Robin to Batman. Lastly, Dig's subplot is that he's going on a personal vendetta against H.I.V.E., an organization that antagonized the Titans... and the Titans are led by Nightwing.

Felicity's father will appear.
After she pops up in tabloids as a fling of Oliver's (you know it's gonna happen), he comes back into her life in order to scam her and her presumed sugar daddy.
  • Partially confirmed. He does appear, and tries to gain her trust to steal from her company.

The Lance family has some sort of genetic face blindness
At this point, it's the Laurel and Quentin have.

Shado is alive
Her body was found by the League of Assassins and they threw her into a Lazarus Pit. Now she's an assassin, and the one behind Slade, since the revenge against Oliver is hers.

Felicity counted cards to put herself through school.
MIT is a freaking expensive school, yet neither she nor Oliver mentions student loans, which she would still be paying off. No IT department pays that well, and when Oliver promotes her in season 2, he never mentions outstanding debt, despite that debt and the pay raise being arguments Felicity couldn't really deny. And yes, she's a genius and scholarships exist, but you have to be a genius just to get into MIT. The requirements for a full ride are higher. Plus, most scholarships don't extend to room and board, meal plans or textbooks. Also, in The Undertaking, she knows how to count cards, and she's comfortable doing it. It's clearly not her first time.

A Pre-Nightwing Dick Grayson will appear in a Backdoor Pilot for Titans
Despite it airing on a different network, TNT is still owned by Time Warner, making it possible to be in continuity. When he appears, it'll be as Robin. He arrives at Starling City without Bruce's permission after finding out that Tony Zucco, the mob boss that killed his parents, was operating there. He and Roy will work together to bring down Zucco. When he confronts him, Dick will accidentally kill (or brutally beat him to near-death) Zucco in a fit of rage, causing him to have a Heroic BSoD and step down from the title of Robin. The pilot episode of Titans will be about Dick regaining his confidence to fight crime and become an independent hero.
  • Titans has been canceled, but with even more Teen Titans/Young Justice characters showing up in the CW shows, there's certainly plenty of opportunity for a Titans special.

The Atom
The producers have said before that the Arrow version of The Atom won't have his size-shifting powers, which lines up with the fact that Ray Palmer is filling the void left by Ted Kord when DC's higher ups nixed plans for him to appear. However, the producers have also had a very... inconsistent stance on super powers appearing on the show. My theory is, when The Atom initially appears, he will be nothing more than a guy in a strength-enhancing super suit, and his only ties to his shrinking ability will be the "impossibly miniaturized technology" that the suit is made of. Eventually, though, something will happen and Palmer will be forced to shrink to save someone (maybe the city, maybe Team Arrow, maybe just Felicity), and will "sacrifice" himself, allowing himself to undergo the same miniaturization process his technology underwent, knowing full that it is most certainly going to prove fatal. He saves the person/people he was attempting to save, but as he is awaiting his imminent death from organ failure or whatever, he realizes that there were no adverse reaction — He is mysteriously immune to the fatal side-effects that plagued all other living tissue subjected to the miniaturization process, so naturally, he adds a shrinking device to the suit's armory.
  • Alternatively, Ray may remain a non size-shifter until he ends up on The Flash, and will be exposed to some dormant energy from the particle accelerator accident while wearing the suit, and will become a size-shifting metahuman.
    • S4 reveals Ray is a size-shifter. He didn't die in the explosion and has, in fact, infiltrated Felicity's phone.

The Absence of the Arrow will lead to Huntress' return.
She's trying to redeem herself now, and once she hears that Oliver is out of Starling she'll return and try to fill that void.
  • Jossed.

Diggle's full name is John Stuart Diggle.
Which will probably have no effect on the show or the franchise whatsoever.
  • Hoping the latter portion of this WMG is wrong. GL is supposed to be on his way and it would be great if John Stewart was the man since HJ is likely going to be the Silver Screen variant via BvS.

Playing off the above, Diggle will be a Blue, not Green, Lantern
If Diggle was a GL, he would be way too powerful for Arrow and would overwhelm Oliver as the leading man. A Blue Lantern, though, has most of the main powers of a GL but dramatically weaker (unless they are near a GL, like maybe Hal Jordan?) and he could calm down fights before they start.

Now, in this last season, Diggle's played the peacekeeper (Blue Lanterns can remove red lantern rings) with Ray stepping in when Diggle is angry. Diggle also got several lines that talked about his "hope" and Diggle was both more likely to wear blue this season and when in the Palmer Tech Cave only he would be surrounded by the blue lights. Most of the time the others weren't in the same shot, or were shadowed if they were.

  • Blue, eh? What if he's an alt Blue Beetle?

     The Island 

Oliver was stranded on the Lost island.
Tommy's "They were all dead, I think" joke in the pilot episode wasn't a joke; it was a hint.
  • Seems jossed.

The island was actually a secret test facility for Queen Industry to create metahumans or some such.
Oliver isn't just trying to the keep the secret of his skills, he's also trying to keep the secret of the island itself. When he washed up on the island, he eventually stumbled upon the facilities and ended up getting sucked into whatever was going on. This facility is where he was taught a lot of his skills. Alternatively, it was a facility for something like the League of Shadows or something akin to that. Regardless, there's a lot of suggestions that the island wasn't exactly deserted and uncivilized.
  • Jossed.

There's another group on the island.
The Bratva has taken up an unexplored portion of the island. Oliver and Slade will go there for supplies, only to be ambushed. Oliver will plead that they don't kill him, and they will ask him to do something for them to prove that he is not a threat. He will do exceptionally at this, at which point they will recruit him into the organization. Eventually, he will rise to the rank of captain. Soon after, Oliver will point out the existence of Fyers' group. The Bratva will find their camp, and wage battle with them.
  • Jossed-the other group arrives on the island after Ollie and co defeat Fyers, and they're not Bratva. They're a research group looking for a serum called 'Mirakuru'.

Baron Reiter knows Oliver is a spy, but is keeping him alive for the time being.
And Conklin's determination to expose him is making Reiter's plan difficult.
  • Jossed. Reiter doesn't know Oliver is a spy until discovering that he didn't kill Taiana.

    Post-"Climb" Theories 
The fall run of Season 3 was, in retrospect, The Death of the Arrow. The spring run will be Rise of the Archers.
They're the Arrow version of the Supermen.
  • Roy continues to be 'Arsenal'.
    • Confirmed.
  • Helena breaks out of prison to follow Ollie's example as the 'Huntress'.
    • Jossed.
  • Ray will become the 'Atom' (The Arrow version of Steel).
    • Confirmed.
  • Laurel will become the 'Black Canary'.
    • Confirmed.
  • Thea will don the green hood as the 'Arrowette'.
    • Jossed. She's Speedy.
  • Felicity will run them all as the 'Oracle'.
    • Jossed. She doesn't get an identity in Season 3, and becomes Overwatch in Season 4 Oracle was already taken.

The Lazarus Pit will appear and is connected to Mirakuru.
Mirakuru was an unsuccessful attempt to artificially duplicate the Lazarus Pit's regenerative powers.
  • Partially confirmed. The Lazarus Pit does appear, but is never indicated to have any connections to Mirakuru.

There will be a Time Skip between "Climb" and the next episode.
After the time skip, Oliver will appear resurrected but crazy due to the Lazarus Pit.

By the end of Season 3, Thea will become a vigilante.
Going by either Speedy (doubtful) or Artemis. After she discovers that Malcolm Merlyn brainwashed her into becoming a killer, she severs all ties with him completely. Horrified and guilt-ridden by what she's done, she seeks redemption by fighting crime and injustice alongside her brother and ex-boyfriend.
  • Speedy confirmed.

Season 3 will include a loose adaptation of Over the Edge.
It's no secret that Arrow borrows a lot from the Batman mythos, and the PaleyFest 2015 trailer shows Quentin and the SCPD storming the Arrow Cave, as well as a meeting between Quentin and Ra's. There's even a Scarecrow-like figure available in Werner Zytle. Perhaps Laurel gets another dose of Vertigo and hallucinates the entire episode?

    Other Theories 

The series so far has been All Just a Dream
The scenes that are happening on the island aren't flashbacks, they are what's currently going on.
  • Or, it's all in Quentin Lance's head. After Sara died on the cruise, he became an alcoholic, and thought of how Ollie "killed her". Ollie and Sara never found the island they died at sea. Ollie and Sara coming back was a part of this. ved with helping the underprivileged in Starling City.

The show will have a Cowboy Episode in which Roger Parsons (a.k.a. Golden Arrow) will be referenced.

If the Booster Gold pilot is turned into a full TV show, Booster Gold and Arrow will be set in the same universe
They will have guest appearances on each show during breather episodes (Hilarity, of course, ensues), and Ted Kord will be a semi-regular in both shows.
  • Ted and Ollie could meet because Ted's father or uncle is on the list.

Reston's riot shield was able to stop Ollie's arrows (which had been shown to pierce metal) because Ollie wasn't shooting to kill.
By that point in time, Ollie had heard the father's story and so he lacked the emotional detachment he usually has needed to kill/he was hoping to resolve things peacefully (or at least, non-lethally). Thus he was both shooting to wound as well as not using a full pull on his bow.
  • The riot shield would stop them even at full power, and holding it at an angle would deflect the arrows easily. So, probably not.

Because it seems to be a running gag...
Tommy will get My Sister Is Off-Limits or some variation thereof with every female character on the show.
  • Tommy's dead.

Gotham will be mentioned.
Bludhaven has appeared, and Gotham is adjacent to it. It would make sense.
  • A character mentioned being locked up in Blackgate Prison on an episode of The Flash.
  • Wayne Tech is mentioned in The Flash.

There'll be other Doctor Who actors in the show
We've got John Barrowman/Captain Jack and Alex Kingston/River Song. This troper wouldn't mind Arthur Darvill/Rory as a guest star.
  • David Tennant for The Joker!
  • Confirmed, Arthur Darvill is rip hunter.

The list was written by the mysterious woman.
This goes with an above WMG, which states that the list was written by a Greater-Scope Villain. Assuming that the mysterious woman is either a Greater-Scope Villain or part of a Big Bad Duumvirate, then she could very well have composed the list.

Malcolm was paying off several highly-placed police officers to keep his activities as The Dark Archer secret.
The show's tie-in comic showed that Malcolm spent some time going after random criminals in The Glades as The Dark Archer yet nobody in the police department noted Oliver's activities as being similar to a hooded vigilante with a bow some 15-20 years earlier. Paying off various high-ranking cops to ignore any dead bodies turning up with black arrows in them would insure that Malcolm could continue The Undertaking undisturbed. This would also explain why Detective Lance's superior is so ambivalent about the tip-off that Malcolm Merlyn is plotting to blow up The Glades and more concerned with seeing Quentin Lance suspended or arrested.

The tennis balls are a nod to Shakespeare's Henry V.

The thing The Mayor was injected with was Venom.
  • It was green, and Blood called it a "miracle". With superpowers being introduced this season, Venom doesn't seem too unlikely. And it will be created this season. And while Bane probably won't be behind it, he could appear in future seasons.
  • Alternatively it could be Blockbuster formula.
    • Now it looks like it might be Miracle
      • Which Venom is actually an improved version of, so not that far off.

The introduction of Mirakuru will tie Arrow to The CW's planned Hourman series.
  • Jossed.

Nightwing's possible appearance, combined with Roy Harper's development, the Flash show, and the, still-on-hold, Wonder Woman show will lead to a Teen Titans spin-off miniseries
  • Currently, Steven McQueen is currently campaigning for the role, and if allowed, he could very well appear in the show as Nightwing, and given his age, he'd likely make better friends with Roy than Oliver. Assuming Roy eventually gets trained, somewhere down the line, the two will likely become great friends and vigilantes. Meanwhile, the Flash Spin-off will hopefully include Wally West, and develop him into Kid-Flash, and he too will become great friends with the pair. Amazon will eventually push forward and will hopefully also include Donna Troy as Wonder Girl. Somewhere down the line, the four of them will team up for a mini-series, joined with other superhero teens, where they form the Titans.

The Man within the Blur Barry saw was his DCU counterpart
the comicbook Flash went back at the end of Flashpoint to undo the damage that has been caused but unfortunately he created several alternate timelines one of which is the Arrow Universe.

[[This series will become part of the planned DC Cinematic Universe]]

Similar to how Joss Whedon is planning a SHIELD television series that is part of the Marvel Cinematic Universe, Arrow (and the other tv shows) will become part of the new DC Cinematic Universe alongside Man of Steel and the other Justice League movies, as a result of the show's multiverse having such popularity. This would definitely help DC to build their desired movie universe (perhaps Arrowverse Flash could appear in a DCEU Flash movie, or Henry Cavill's Superman (from Man of Steel) could appear in an episode of Supergirl). They have so many good DC characters introduced in these shows so the new DCEU could gain so much by including the worlds of the Arrowverse.

Oliver will be forced into an Enemy Mine with Malcolm
To take down Slade and Brother Blood; possibly they will reluctantly team up when Thea's life is on the line.
  • Malcolm will push Oliver's buttons every step of the way. In return, Oliver will tell him that his own son's death was Malcolm's doing.

A Green Lantern will appear in the series
  • I have two guesses as to how this could go down.
    • 1) Construction for a railway line starts to be mentioned, and we get introduced to one of the workers: Alan Scott
    • 2) An old army buddy of Diggle comes to Starling City to get some advice, at the end of the episode, a blue hand taps John Stewart on the back.
    • 3) Oliver met a boy who's father is a pilot at Ferris Airfield, where Robert was conducting business.

Brother Blood and Ivo aren't the only ones who've been working with Mirakuru
Namely, a project in the country of Santa Prisca called "Project Gilgamesh". They managed to reduce the side affects, but at the cost of making it only temporary. They called it Venom, and they got a test subject from Peña Duro prison.

Slade was checking out Thea
I could be wrong but the whole Terra thing has made Slade a Memetic Molester for this troper.

MacGregor's Syndrome was mentioned in "Time of Death" specifically in case they wanted to include Mr. Freeze
Come on, you were thinking that too.

Oliver's illegitimate child revealed in the "Seeing Red" flashbacks is Connor Hawke
And will probably make at least a cameo in the Flash spinoff, because Moira ensured the mother and her unborn child moved to Central City, and by the present day timeline, should be seven years old.
  • Jossed. Connor Hawke is John Diggle Jr.

The Mirakuru cure is only temporary.
  • Eventually, Slade and Roy will get their powers back.
    • Probably not Roy, since he's a Badass Normal in the comics, but Slade's could given he had powers in the comics that were weaker than in the show. Given Roy's was driven from Slade's blood, its possible his sample was weaker and so easier to cure, while Slade, who's had Mirikuru in his system for years, would probably be strong enough to either regain his abilities after some time, or it'll turn out his powers were just nerfed, not removed completely.

Season 5 will be the final season.
Oliver was gone for 5 years. Each episode has a flashback to what he did 5 years prior.
  • They could still continue, but with the fan backlash from Laurel's death, it doesn't look likely that Arrow will be renewed for Season 6.
  • I think we'll get 6.

The season 5 finale will lead into the Justice League movie.
Building on the previous WMG, season 5 could be the last season, and it would end in 2017, the year in which the Justice League movie is gonna come out. Stephen Amell will reprise his role as Green Arrow in the film.

The show will follow the broad trajectory of the pre-New 52 Green Arrow history and continuity

Despite the fact that Arrow is seemingly its own animal, from Season 2 onwards, the show is clearly making greater attempts to steep itself in the comic-book mythos. And with recent developments, certain patterns are emerging, which suggest that the aim of the showrunners is to loosely follow the trajectory of Green Arrow history from the comics.

Consider this. Green Arrow's history in the comics can be broadly classed into the following eras-

1. Origin and Solo Career: Oliver goes through his island experiences, returns, and becomes a solo vigilante. Covered largely in stories like Green Arrow Year One and the odd flashback here and there.

2. The Classic Era: Green Arrow gets a sidekick in Speedy. Covered mostly in classic Golden Age and Silver Age stories (along with miscellaneous flashbacks). The Green Arrow comics actually began In Medias Res during this era.

3. The 'New Look' Era: Green Arrow grows a beard and becomes a liberal loudmouth. He and Roy split and he starts working with Black Canary instead. Covered in the stories of the 70's and early 80's, starting with the 'Hard Travelling Heroes' arc with Green Lantern.

4. The 'Urban Hunter' Era: The Mike Grell series, starting with The Longbow Hunters. Green Arrow becomes a more realistic urban vigilante and fights crime alongside Black Canary.

5. Post-Resurrection Era: After Oliver returns from the dead, he works alongside an extended Team Arrow, including Mia Dearden and Connor Hawke. Basically all the modern stories, starting with Quiver, up until the reboot.

Now compare this to the progress of the show so far.

The island origin is being covered throughout the series in the flashbacks. The Solo Career phase was covered in Season 1 and 2, with Oliver embarking on his career as the solo vigilante, and then later establishing the 'Arrow' persona. Starting with Season 2, the show starts to move towards the Classic Era, with Roy starting to get involved with the Arrow and more comic-booky elements being introduced. By Season 3, we're firmly in the Classic Era, since Roy is now in costume and working alongside the Arrow as his sidekick/partner.Now, with the hints we've been given that Laurel will be evolving into the Black Canary in Season 3, I think its a fair bet that by late Season 3/early Season 4, the show will have transitioned into something resembling the New Look Era, with Green Arrow and Black Canary working together, and Roy possibly leaving the team. And at some later point, in Seasons 4 or 5, if Thea, who is an Expy of Mia Dearden, returns to Oliver's side, then we could be in the Post-Resurrection Era.

Of course, none of this is set in stone, and the writers are mixing things from different eras. For instance, Season 1 clearly had the aesthetic of Mike Grell's Urban Hunter era thrown in. And I doubt Oliver is ever going to become a liberal loud-mouth on the show. But I think in a larger sense, they will be following this broad trajectory.

There will be an adaptation of Flashpoint
This theory has also been posted on The Flash. If they can't use Batman, then he will be replaced with the Arrow. In the alternate universe, Oliver died in the shipwreck and Robert Queen became the Arrow. After finding out his wife re-married and worked with Malcolm Merlyn on a device that destroyed the Glades, he becomes a violent anti-hero. He would kill Merlyn, and Moira would end up becoming that universe's version of the Dark Archer, much like how Martha Wayne became the Joker.
  • Since Aquaman and Wonder Woman won't likely appear, they replace the war between the Atlanteans and the Amazons with some huge war happening offscreen. Conflicts between the US, Kasnia, and China lead to World War III, that'll escalate into a nuclear war (possibly caused by the Brother Eye terrorist group). There'll also be references to Buddy Bank, "Command-D", and the Atomic Knights; and refers to the impending nuclear attack as a "great disaster".
    • The war could be between the League of Shadows and the HIVE.
  • If the adaptation is a multi-episode event between both shows, the first Arrow episode of the arc would open with a narration from Robert Queen like as if he's always been the Arrow.
  • Jossed, technically. There isn't one on Arrow. There is one on The Flash that lasts a total of one episode, and isn't nearly as large-scale as comic book Flashpoint, but it exists.

Merlyn was lying about the mind control, and Thea was acting of her own free will
Just throwing it out there

Brick is a Mirakuru solider!

He survived a head shot from Diggle, and then beat up Diggle like he was a chump. He must have been someone strong enough to resist the General insanity, and escaped before Oliver and the others cured the other soldiers.

Season 5 flashbacks will be an adaptation Super Max.
The old proposed Green Arrow movie which would feature Oliver being locked up in and escaping from an ARGUS super villian prison.So Season 3 flashbacks will deal with Hong Kong, Season 4 will be Russia with Oliver going undercover with the Bratva. The aftermath will be Waller imprisoning him in the ARGUS supermax prison back on Lian Yu, which over the course of the season he will escape from leading to his rescue as seen in the Pilot.

Maseo and Tatsu's son is the DJ from Thea's club
  • Jossed. He was actually from the League of Assassins.

After Oliver returns, Roy will bring him up to speed, mentioning how Merlyn said Thea's problems were family business and telling Roy he wasn't family
Oliver's will just say "Merlyn was wrong."

By the end of Season 3, Felicity will leave Team Arrow
The whole of Season 3 has gone towards proving that she's a crusader in her own right, even without Oliver. And now, as off "Uprising" she's disillusioned with Oliver over his seeking help from Merlyn. That, plus the fact that she's getting closer to Ray and is going to help with the 'Atom' project does strongly suggest the possibility that by the end of the season, she will leave Team Arrow (at least temporarily) to work exclusively for Ray, or to eventually become an Oracle-like figure in this universe.
  • Jossed to the point of oblivion by Word of God.
  • We can only dream.

The theory about a Lazarus Pit resurrecting you-know-who won't apply.
My reasons for this guess are as follows- if such a method was available Nyssa would have done it with or without her father's approval, and also Sara Lance has been dead for a damn long while.
  • Apparently Jossed, as she looks to be coming out of a Lazarus Pit in the trailers for the new show.

The Senator from "Suicidal Tendencies".
Is going to be a problem for for Lyla and Diggle. He pretty much covered his tracks regarding the whole fake hostage thing. Except for two American operatives who know what he done and what he is capable of. I wouldn't be surprised he ends up trying to kill them both and ends up killing Lyla in the crossfire.

Brick isn't bulletproof
Every time we see him get shot, it's with his own gun. He could've loaded his gun with rubber bullets or something when that happened to give him the bulletproof reputation. This would explain why arrows managed to hurt him. It would also explain why at the Glades police station, when he gives the two mooks his "If you take me down you walk out alive" deal, he doesn't let them reach for the gun because it's loaded with live rounds.

Oliver will kill/usurp Ra's and defang the League.
A few bits of foreshadowing are going to come to a point at the end of Season Three. 1. Oliver has thus far lacked the killer instinct necessary to defeat Ra's, but he will gain it in the League after witnessing Ra's crossing the Moral Event Horizon. 2. Maseo's assistance during Team Arrow's daring escape shows that an assassin forgetting their past self isn't so easy. Oliver is still a good person at heart and will do the heroic thing when it really counts. 3. After his trouble with the Starling police, he said he can't be the Arrow anymore. The League now says he can't be Oliver Queen anymore.

It's Doylist to say this, but it's unacceptable storytelling to ever have Oliver commanding a legion of assassins, even if he tells them to not kill anymore (as Ra's previously suggested). No, the only option for a season finale is one where Oliver is forced to kill Ra's, he orders all the assassins to pursue a life of nonviolent charity and public works, and goes back to being a Team Arrow vigilante — without trying to be Oliver Queen at the same time.

Quentin Lance will die by the end of Season 3
His story has pretty much run its course on the show. All possibilities with his character have been exhausted. That's typically when the showrunners decide to kill off characters on this show.Its also worth noting that Quentin fits another pattern established in the previous two seasons with 'soon to die' characters. In Season 1, Tommy learns about Oliver's double-life and has a falling out with him. By the end of the season, he dies. In Season 2, Moira becomes estranged from Oliver, and later reveals that she's aware of his double-life, just before she dies. Likewise, in Season 3, Lance has turned against the Arrow, and also discovers that Oliver is the, as per the pattern (and the fact that there's nothing more which can be done with his character), he will die.
  • It will be A Death in the Limelight episode, with flashbacks showing him getting into SCPD and highlights his life with his family. I also want to guess young Quentin will be played by Dustin Clare cause a.) the actor looks a lot like Paul Blackthorne and b.) the show doesn't hide the fact that they love casting Spartacus alumnae.
    • Jossed, he's fine.

In Season 4, when Oliver returns to the crusade, he will pretend to be someone inspired by Roy Harper
So as off "Broken Arrow", the people of Starling City believe that Roy Harper was the Arrow and that he died in Iron Heights prison - or at least, that's what the official story is. When Oliver returns to the crusade as Arrow or Green Arrow (as he inevitably will because Status Quo Is God) in Season 4, he will pose as a 'new' vigilante taking up the mantle of the fallen 'original' Arrow, Roy Harper. This will serve a dual purpose - it will not only explain the Arrow's return after his official 'death', but it will also be a way for Oliver to acknowledge Roy's sacrifice by making him a martyr to the people of Starling City.
  • And that's exactly what happened. More or less.

The fall of Ra's al Ghul will directly lead to the Season 4 story-arc
Word of God has confirmed that Damian Darhk and HIVE will be the central villains of Season 4. And in "Al Sah-him", Ra's explains the origins of HIVE, claiming that its a splinter faction of the League of Assassins formed when his rival, Damian Darhk, escaped Nanda Parbat with waters from the Lazarus Pit and his own band of loyalists. And its implied that the League and HIVE have been at war ever since, with the League countering HIVE's agenda.Now, when Season 3 ends, its very likely that Ra's will be out of power and the League will, if not totally disbanded, be in complete disarray, thanks to the efforts of Team Arrow. This leads to a Nice Job Breaking It, Hero situation, where the resultant power vacuum allows HIVE the opportunity to make a solid move for world domination (or whatever is Darhk's master-plan). And so, next season, Team Arrow (or whatever is left of it...) has to clean up the mess by going up against HIVE.

Damian Darhk will be revealed to be responsible for Malcolm Merlyn surviving the Season 1 finale
Merlyn told Moira that "There are places in the world where death is an illusion...I've been to one". It was always assumed that this was a veiled reference to Nanda Parbat and the restorative properties of the Lazarus Pit. But given that Malcolm was believed to be dead by the League until Moira informed them in "The Scientist", its highly unlikely he was able to take a dip in the Lazarus Pit.But, in "Al Sah-him", Ra's reveals that Damian Darhk fled Nanda Parbat, taking with him "water from the Lazarus Pit". So, is it possible that Merlyn was resurrected from his near-death state by Darhk for reasons as yet unknown? Perhaps Merlyn has been working as a deep-cover H.I.V.E. agent all along, and his Xanatos Gambit to manipulate Oliver into killing Ra's might not just have been part of his survival plan, but a H.I.V.E. mission.
  • Jossed... technically. Its never been stated at all how Malcolm survived. Theoretically it could still be confirmed that Dahrk saved him, but so far its not the case.

What other Doctor Who/Torchwood alumni will join the DCW-verse
  • We've already got John Barrowman/Jack Harkness/Malcolm Merlyn, Alex Kingston/River Song and now Arthur Darvill/Rory Williams/Rip Hunter unless I'm missing any other names.

The Arrowverse is a parallel universe to the universe of Supergirl2015
The Flash (2014) has already introduced the concept of the multiverse and it's possible that the Supergirl universe is a part of it. It is possible that the Arrowverse is a parallel universe where Krypton never exploded or Kal-El and Kara never made it to Earth. In the Supergirl universe, Superman saved Oliver when the Queen's Gambit sank and prevented the death of Barry Allen's mother, which would explain why the Arrow and the Flash aren't a part of her universe.
  • Confirmed.

Oliver was revived with the Lazarus Pit
His hypocritical actions and insistence to taking down Ra's in-spite of having the chance to get out of dodge once Merlyn was captured by the LOA make far more sense if you assume its the Bloodlust acting up. He needed to kill Ra's to end it before it got to a similar level as Thea and Sara have it, which is why he feels 'happy' once Ra's is dead.

Felicity Is A Sociopath.
  • When you think about it, she matches the criteria.
    • Glibness and Superficial Charm. - In spades. Snarky in any situation, no matter how serious things are. Superficially puts on an "adorable" act, but is a horrible person.

    • Manipulative and Conning. They never recognize the rights of others and see their self-serving behaviors as permissible. They appear to be charming, yet are covertly hostile and domineering, seeing their victim as merely an instrument to be used. They may dominate and humiliate their victims. - One rule Felicity, another for everyone else. Bosses everyone around. Exploits Oliver's ptsd and trust issues. Humilates Oliver in front of his team.

    • Grandiose Sense of Self. Feels entitled to certain things as "their right." - Self-explanatory.

    • Pathological Lying. Has no problem lying coolly and easily and it is almost impossible for them to be truthful on a consistent basis. Can create, and get caught up in, a complex belief about their own powers and abilities. - Absolutely.

    • Lack of Remorse, Shame or Guilt. A deep seated rage, which is split off and repressed, is at their core. Does not see others around them as people, but only as targets and opportunities. Instead of friends, they have victims and accomplices who end up as victims. The end always justifies the means and they let nothing stand in their way. - Unconcerned about thousands dying due to her actions. We also literally saw her split off and repress her younger, more overtly angry self a few episodes ago.

    • Shallow Emotions. When they show what seems to be warmth, joy, love and compassion it is more feigned than experienced and serves an ulterior motive. Outraged by insignificant matters, yet remaining unmoved and cold by what would upset a normal person. Since they are not genuine, neither are their promises. - Self-evident.

    • Incapacity for Love. - Genuine love? Yes I would say she seems incapable of that, actual love requires understanding and being able to put the other person first (at least some of the time).

    • Need for Stimulation. Living on the edge. Verbal outbursts and physical punishments are normal. Promiscuity and gambling are common. - Verbal outbursts, check. Need to live on the edge was demonstrated when she kept lying to Oliver so she could vicariously crime fight on the side.

    • Callousness/Lack of Empathy. Unable to empathize with the pain of their victims, having only contempt for others' feelings of distress and readily taking advantage of them. - Check.

    • Poor Behavioral Controls/Impulsive Nature. Rage and abuse, alternating with small expressions of love and approval produce an addictive cycle for abuser and abused, as well as creating hopelessness in the victim. Believe they are all-powerful, all-knowing, entitled to every wish, no sense of personal boundaries, no concern for their impact on others. - Check, check, check.

    • Early Behavior Problems/Juvenile Delinquency. Usually has a history of behavioral and academic difficulties, yet "gets by" by conning others. Problems in making and keeping friends; aberrant behaviors such as cruelty to people or animals, stealing, etc. - Her history as a hacker and stealing from her work place. Doesn't seem to have any friends of her own.

    • Irresponsibility/Unreliability. Not concerned about wrecking others' lives and dreams. Oblivious or indifferent to the devastation they cause. Does not accept blame themselves, but blames others, even for acts they obviously committed. - Every episode?

    • Lack of Realistic Life Plan/Parasitic Lifestyle. Tends to move around a lot or makes all encompassing promises for the future, poor work ethic but exploits others effectively. - Literally lives off of her "dead" ex-boyfriend's company. Doesn't bother attending board meetings, pretty much ran the company into the ground. On the promises front to Oliver, need I say more?

    • Criminal or Entrepreneurial Versatility. Changes their image as needed to avoid prosecution. Changes life story readily. - Little bit.
  • Considering Felicity's actions throughout the show, it would explain a lot about her.

     Season Four Theories 

Oliver and Felicity will be targeted while they are away
And this will compel Oliver to get back into the game.Either they are attacked and Felicity is grievously injured, leading Oliver to seek vengeance...or Felicity is kidnapped, leading Oliver on a mission to find her. This will also lead to Oliver and Diggle reconciling and working together because of what happened to their mutual friend/comrade. And it will lead to them discovering that Oliver, Felicity or both of them were being targeted by H.I.V.E...kicking off the central plot of this season.
  • Jossed.

Felicity's father is connected to HIVE
Word of God says that we will likely learn more about Felicity's father in Season 4, so chances are he will be involved in the H.I.V.E. plot somehow. Either he's a genius computer engineer/hacker who is kidnapped by H.I.V.E. to do their bidding, or he has dealings with them, or he's a member. OR...
  • Except for the part of computer engineer/hacker, jossed. See below.

Felicity's father is Damian Darhk
It would make sense if one assumes that Darhk, being a rogue League of Assassins leader, lives and operates far more stealthily than Ra's. After all, the decoy Damian Darhk in the Season 3 finale was living in a Starling City hotel, something Nyssa says Ra's would never do. So its likely Darhk, unlike Ra's, doesn't live in his own fortress surrounded by an army, but instead lives quietly as a civilian, blending into the populace. And in this guise, he might have met a cocktail waitress named Donna Smoak and had a brief affair with her, resulting in Felicity's birth. Maybe he only stuck around for a while because he noticed that the child had inherited some of his genius and had so much potential. So he kept an eye on her from afar and now he's ready to be involved in her life again.
  • Normally, this would be great. But after she was written and depicted in Season 3, this could endanger her of becoming a full-blown Creator's Pet (if she's not one already). Having her father be simply connected would logically be enough.
    • Jossed. Her father is confirmed to be Noah Kuttler, AKA The Calculator.

In the flashbacks, Oliver will meet Andy Diggle
When Oliver first met John, he seemed to know all about his brother Andy's death. While he could have easily researched it, it might just be possible that Oliver knew Andy years ago. They might even have been friends. Then Andy was murdered by an unknown assassin (whom Oliver years later discovers was Floyd Lawton), and Oliver may have investigated it (albeit, he, like everyone else, believed that Andy's employer was the real target). So Oliver will have some involvement with H.I.V.E. in the flashbacks, but he won't really the true significance of those events until five years later, during the present-day story.
  • Jossed, though Andy did know Baron Reiter, the latter of whom Oliver meets.

Andy Diggle was a former member of H.I.V.E.
Though any of these possible scenarios, he...
  • Realized what kind of people he was working for and left the organization, only to be killed since he knew a lot of integral matters, so the org hired someone (Deadshot) to ensure everything related to them will not get out, ala Robert Queen for Tempest. The similarities would be a good way for Diggle to realize that he and Oliver are not so different, leading to their eventual reconciliation.
  • Was killed simply because he has served his purpose.
  • Was forced to join by some circumstances he couldn't control, which is likely since this is what A.R.G.U.S. does and H.I.V.E. is an Evil Counterpart to the former (yes, that's the possible) and then found a way to leave and be killed for it.
  • Confirmed and Jossed. Mostly confirmed. Andy Diggle IS a member of HIVE, not a former member.

Andy Diggle was not as good as his brother believes
In relation to the aforementioned former member of H.I.V.E. theory. He was a power hungry, high-ranking member and was ordered to be assassinated by members due to power struggle, either by those struggling to rise to the ranks or his contemporaries. John, Carly and his son were merely his Morality Pets. Either way, expect some Broken Pedestal Tear Jerker moments for Dig.
  • Essentially confirmed in Haunted—Andy wasn't a member of H.I.V.E., but he was a crime lord.

Season Four will establish Laurel and Thea's bond to be similar to that of Black Canary and the Mia Dearden Speedy in the comics.
They are already close, but the time they will spend together as they fight crime will bring them family-like closeness. Especially in light of Oliver leaving and Sara being apparently Killed Off for Real.

The Huntress will return this season.
With Oliver Walking the Earth with Felicity and Roy being forced to leave, it's the perfect time for her to start her Redemption Quest to be the Anti-Hero that she is in the comics. Plus, it will also be a good time to start dropping Birds of Prey Easter Eggs since majority of Team Arrow are now female.
  • Jossed sadly. Maybe she'll be in Season 5.

Season Four will introduce the Green Arrow's most famous roadtrip partner, the Green Lantern Hal Jordan.
  • Coast City has been creeping into the setting for both The Flash and Arrow, culminating in Ollie boarding a freighter bound for Coast City in the third season finale.
  • The Flash mentions that Ferris Air Field has been abandoned since "that test pilot went missing."
  • We're going to see Hal go missing in the Season 4 flashbacks, only for him to return in the present day storylines as a space cop.
    • Though an actual role in the plot is still up for debate, Hal does have a brief cameo in the Season 4 premiere as The Faceless.

Nyssa is the one who revives Sara.
  • Let's go down the list. Malcolm: Jerkass Villain Sue. He wouldn't do it. Olvier: Season 3 proved he didn't care about Sara, besides he's off with Felicity. He wouldn't do it. Laurel wouldn't dig up her sister or go near Nanda Parbat. That leaves Nyssa to dig up her lover's corpse and somehow get her to Nanda Parbat and sneak her into the Lazarus Pit and hope it works. Thanks to Legendsof Tomorrow, we know that it does and it makes sense that it would be Nyssa who brings her back to life.
    • Jossed. Nyssa was appalled at the idea, and Malcolm did in a sad attempt to prove to Thea he wasn't a completely horrible person.

Malcolm is the one who revives Sara.

  • As noted above, Malcolm is a Jerkass Villain Sue. However, he's also not an idiot. And right now the biggest threat to his rule of the League of Assassins is Nyssa, who accepts his leadership begrudgingly and will almost certainly turn on him at the first opportunity. Resurrecting Sara - while unlikely to buy total forgiveness - might be enough of a bargaining chip to stay any immediate attempts on his life. Of course reviving a woman he murdered by proxy who is likely to hold a grudge against the daughter he claims to truly love that carried out said murder would be foolish in the long-term but this isn't the first time we've seen Merlyn play Xanatos Speed Chess.
    • Sort-of. Malcolm revives Sara in order to try to show Thea he isn't horrible, since she brought Sara's body to Nanda Parbat with laurel.

Season Four will reveal that Dr. Ivo was actually hired by H.I.V.E. to find the Mirakuru
Just as Season 1 flashbak Big Bad Edward Fryers was revealed to be hired by A.R.G.U.S. in Season 3, Season 4 will do the same with Season 2 flashback Disc-One Final Boss Ivo with H.I.V.E. It will actually makes sense though. H.I.V.E. is apparently at odds with A.R.G.U.S. and definitely with the League of Assassins, so in order to combat two powerful organizations, they would need something that will greatly enhance the organization and their fighters' offensive and defensive capabilities. According to Ra's, Damian Darhk took a decent amount of water from the Lazarus Pit, but obviously it's limited so they would need a better option. And what better option is there than the Mirakuru - a drug that (again) greatly enhance a fighter's offence (by dramatically increasing their strength) and defensive (Healing Factor) attributes? Around the time Ivo and his men encountered Oliver and company in Lian Yu, H.I.V.E.'s pit is already starting to run out so they hired the Mad Scientist to look for the miracle drug.
  • Jossed. Ivo is never mentioned.

Season Four will reveal that Malcolm Merlyn was been in cahoots with H.I.V.E
Think about it, he mentioned that he "cheated death" in some place after losing to Oliver in the Season 1 finale. He's obviously referring to the Lazarus Pit, and according to Ra's, H.I.V.E.'s founder Damian Darhk stole a significant amount of water in the League's Lazarus Pit. He obviously couldn't bathe in the League's pit, so where else would he do it? Also, he's a League traitor just like Damian Darhk so it would make sense for them to get along. For all we know, H.I.V.E. was a major, if not the main, sponsor of Merlyn Global. Malcolm's ascension as the new Ra's Al-Ghul will probably make him some sort of a Double Agent, or he'll be Playing Both Sides.
  • Jossed. Malcolum joins H.I.V.E., but nothing was stated about him being in cahoots with HIVE before that.

Starling City will no longer be the focus of the series.
In the season three finale, Oliver felt he could retire as The Arrow because he realized that Starling City is in good hands. This remains true. However, we have also seen that H.I.V.E., unlike past villains, operates on an international scale. Oliver will realize that while Starling City may no longer need him, the rest of the world does, particularly when A.R.G.U.S. becomes overwhelmed. He and/or Felicity may be attacked directly when on vacation.
  • More or less Jossed going by early reports about Season 4. Starling City will remain the focus of the series, with Oliver establishing himself as 'Green Arrow', and in his civilian life, potentially pursuing a career in the political civic arena.

H.I.V.E. will take many cues from HYDRA in the Marvel Cinematic Universe
And much like HYDRA's arch-enemy is S.H.I.E.L.D., H.I.V.E.'s arch-enemy will be A.R.G.U.S., which will play a significantly greater role in the fourth season's main plot.
  • To really establish H.I.V.E. as a serious threat, they could completely take over A.R.G.U.S. and usurp their resources, possibly from within (just like HYDRA did to S.H.I.E.L.D. in the Marvel Cinematic Universe).

H.I.V.E. will take over the ARGUS prison on Lian Yu and will free Deathstroke and Captain Boomerang.
And just to add insult to injury, they may find a new source of Mirakuru and will give it back to Slade. They will want to stop the Arrow at all costs, and what better way than by recruiting his mortal enemy?
  • And Deathstroke could ultimately become The Starscream to H.I.V.E. and once again be the Big Bad of the season.

Sara, once she returns, will be furious with Oliver and may even attack him
Word of God has already said that when Sara is resurrected, she will be seeking vengeance against all those she believes has wronged her. While her "revenge list" will naturally include Thea (at least at first, since her last memory was Thea shooting arrows into her), and Malcolm (the true architect of her murder), its possible that, especially in her disoriented post-Lazarus Pit state of mind, she will blame Oliver for everything that happened and target him. After all, Oliver, rather than avenging her death, shielded her murderer and indeed helped him become the new Ra's al Ghul. Not to mention, Oliver is ultimately the person who, in many ways, is responsible for EVERYTHING that happened to her since she agreed to run away with him on the Queen's Gambit. So its likely that she will target Oliver, but will be stopped by Laurel and/or other members of Team Arrow who make her stand down. Afterwards, she may or may not forgive Oliver fully (she will cool off enough to join the 'Legends of Tomorrow' team though).
  • Sorta. Using the Lazarus Pit to resurrect someone causes them to suffer bloodlust killer rages unless they slay the person responsible for their injury. When she was resurrected, she immediately turned on Thea.

Damian Darkh will have something to do with Sara's resurrection
Maybe he orchestrates her resurrection, either through HIVE agents or traitors within the League of Assassins, either to use her as a Brainwashed and Crazy operative of HIVE, or for her to cause trouble for the League and/or Team Arrow and thus serve as a 'distraction' to them.
  • Jossed.

Malcom Merlyn will remain a Karma Houdini
Seriously, don't even bother getting your hopes up of him facing justice because you saw him and Nyssa fighting in the trailer. After Sara's revival, Oliver will probably pick up the Idiot Ball again and protect him, claiming that now everything has been fixed (while conveniently forgetting all the casualties of the Undertaking).
  • Semi-Confirmed. Merlyn tricked Thea into murdering two of his own men to sate her bloodlust. Thea immediately forgave him, Laurel didn't care and then they revived Sara and let him slide. The only good thing to come out of it was Nyssa destroying the pits.
    • And now Thea has welcomed him back into her life with open arms, just assuming that he can somehow fix her rage problems, with absolutely no mention of what he put her through in the past. So, WMG confirmed.
    • Actually, the chickens may finally be coming home to roost for Malcolm, as Nyssa is demanding that Oliver kill Malcolm in return for a cure for Thea's condition.
    • Completely Confirmed. Season 4 ends with Team Arrow completely forgiving him despite his crimes and working alongside him once again.
    • No, this is completely false. They do not forgive him. They blackmail Malcolm into having him free people from the underground HIVE facility, and in the final episode they do NOT work alongside him. He only helps because he doesn't want to die along with the rest of the world, and the team NEVER forgives him... they just don't go out of their way to capture him or anything.

Malcolm is going to become mayor, and Thea is going to go full Faith
John Barrowman is a regular this season, which would be a bit odd if he's going to be staying in Nanda Parbat with his little assassin club. On the other hand, there are two good reasons for him to come to Star City — Damian Darkh, and Thea.

Meanwhile, Thea is getting off on superheroing, and especially the violence of it. That scene in the first episode when she went crazy on one of the Ghosts was classic Faith in the run-up to her Face–Heel Turn. And, similar to Faith's arc, Thea is going to accidentally cross a line (probably by killing somebody), decide she can't trust Ollie to help her, and instead go to her father for support.

The mayor thing? Well, that's mainly just so the arc would match up with Faith's. Although the post is currently vacant.

  • Jossed. Malcolm would never be able to become mayor considering he destroyed half the city already.

Whoever is in the grave died because they ate Oliver's chili.
Now that he's learned to cook it's only a matter of time before he tries to make it.
  • Jossed. Unless that's what Oliver's promise was...

Who the grave is for;
  • Felicity
    • Felicity, but Oliver is pissed because Darhk used his resurrection / mind control process on her, making her a "Ghost". The grave itself is now empty.
      • Jossed as of "Blood Debts". Unless the one seen is a hallucination.
  • Diggle: He's been there since day 1, and Word of God describes him as an important figure in Oliver's journey to become Green Arrow. Since he's finally done that, what else is Dig here for? Also, a big theme this season seems to be siblings. With Andy both returning, might join Team Arrow in his place and take up the role of Spartan. Additionally, as someone mentioned below, Damien Darhk may not be the murderer, and in fact Reiter almost seems more likely (presuming he's still alive in 2016...which would make sense, given that Shadowspire is still around).
    • Jossed.
  • Quentin: He and Oliver have a turbulent relationship. Still, Oliver holds a high opinion of him and is aware that their rift is mostly his fault. He's also The Mole for Team Arrow. He's also dating Donna Smoak, which could explain why Felicity is so angry because the person that finally makes her mother happy was taken from her.
    • Leaked photos don't look good on his favor: they show Oliver, Diggle, Felicity, Laurel, Thea, Nyssa at the funeral, along with Dinah Lance. There's no particular reason for Dinah Lance to be there except if the funeral was for Laurel or Quentin, and the photo of Laurel looks like she's walking to deliver a eulogy.
    • Jossed.
  • Thea: A big theme this season seems to be siblings. Between Sara and Andy both returning, it seems appropriate that Thea would die and continue this theme of siblings. In addition to her blood lust, Malcolm threatens to come after Oliver if Thea dies, which would generate much more conflict for later plots. Also, killing Oliver's last remaining blood relative that he grew up with would be a huge blow. Dialogues also imply that she's better off dead than being alive but rabid after her dip at the Lazarus Pit.
    • She might get killed while trying to stop Malcolm, especially after their argument in "Taken". Malcolm could very well be the "son of a bitch" Felicity mentioned at the end of "Blood Debt".
    • Probably jossed with the leak of photos showing Thea at the funeral.
    • Jossed
  • Oliver's kid: Killing a child is a major crossing of the Moral Event Horizon. What more if it's The Hero's child whom he never know existed until recently.
    • Likely jossed, since after he was rescued, he and his mother moved away without even telling Oliver where for their safety.
    • Jossed
  • The mother of Oliver's kid: Hence why Oliver is full of guilt and regret.
    • Likely jossed, same reason above.
    • Jossed.
  • Laurel: Word of God says that she will be instrumental in bringing down Dahrk. Also, a big theme this season seems to be siblings. With her bringing Sara back, there might be an Equivalent Exchange. Finally, she's essentially The Artifact and Demoted to Extra starting the last half of Season 3. These, coupled with a number of the Fan Dumb frequently attacking her, will likely push Katie Cassidy on asking to be killed off.
    • Leaked photos, coupled with the rumored casting for Black Canary in the DC Extended Universe, doesn't look good on her favor.
    • Leaked photos show Laurel being present at the funeral.
    • Confirmed. The funeral where she's shown alive is actually a flashback of Tommy's funeral.
  • Roy: He'll likely just be Commuting on a Bus at this point. Also, his death could not only fully pass the torch to Thea, but also push her and the rest of Team Arrow into going for the killer's head. Word of God says he'll be Commuting on a Bus after his departure, but they could be lying.
    • Probably jossed with the leak of photos showing Dinah Lance at the funeral. She'd have no reason to be there for Roy, someone she didn't know.
    • Jossed.
  • Lyla: She's close to Team Arrow and Diggle's wife to boot.
    • Probably jossed with the leak of photos showing Dinah Lance and Nyssa at the funeral. Neither would have a reason to be there for Lyla, also someone neither knows, and although Nyssa knows Digge, they're not particularly friends.
    • Jossed
  • Walter: He's the closest thing both Oliver and Thea has left for a father (Yeah, Malcolm is not really good at being one). He's also close to Felicity, and she's shown pissed about the death.
    • Jossed.
  • Baby Sara: Same deal as Oliver's kid.
    • Jossed.
  • A new character this season that he, Barry and the rest of their respective teams will be close to. Moost likely Curtis Holt.
    • Jossed
  • Donna Smoak: After the events of "Lost Souls", she could easily become a casualty as the season progresses thanks to Darhk discovering Felicity's connection to Team Arrow as well as the potential for a romance between Donna and Quentin. It would also do the most to explain Barry's presence. Felicity has by far had the most interaction with the S.T.A.R. Labs team out of any other character and would in turn be the one whom they would all come out to support (this assumes that Felicity herself isn't in the grave, but her death doesn't seem likely).
    • Jossed
  • Sara: Thus giving her a more proper (and more badass) send-off in stark contrast to the way she was offed in the Season 3 premiere.
    • Jossed
  • Paul, Curtis Holt's husband. Felicity's close to Curtis, and Oliver's seemed to start accepting him with open (well, for Ollie) arms. This could also serve as the catalyst needed to motivate Curtis to become Mister Terrific. Though that would probably make the audience complain about the perceived Bury Your Gays
    • Jossed

How the person in the grave will die
It should be noted that the following examples could overlap;

Nobody is dead; the grave is Sara's
It looks freshly filled in because Oliver and company just dug it up to check whether it's empty again. He and Barry are wearing suits because... well, they'll make up an excuse, but the suit is a red herring. And the "him" Oliver is going to kill is of course Merlyn.
  • And the funeral? They gave the poor dead girl another one? And then there's legends. Couldn't forget that.
  • Jossed. But it is a Lance grave...

Felicity and Holt create a weapon/device of some kind, which is used to kill one of the main characters
Felicity is told that whatever secret project she and Holt are working on, it has to be ready for the next shareholders meeting... In 6 months time. We also know the funeral is held in 6 months time. Whatever the project turns out to be, it will either backfire or be used by Darhk to kill someone off.
  • Jossed.

Sara and Thea will solve their resurrection sickness problem the same way.
Malcolm states that using the Pit causes the dying (or dead) user to suffer uncontrollable bloodlust from time to time until they've dealt with the one responsible for their injury. So who, exactly, is ultimately responsible for both their injuries? Thea was killed by Ra's al-Ghul due to murdering Sara, which she did while being mind-controlled by Malcolm. He is ultimately responsible for what happened to both of them, so...
  • Jossed. Thea does consider killing Malcolm several times, but Sara's bloodlust isn't resolved and Thea stops killing even though it will kill her. She's ultimately given the Lotus to save her life.

Felicity's father is the Calculator, one of Darhk's "associates."
The three details about Felicity's dad are that he's evil, he's a tech genius, and he married Mama Smoak, a Vegas cocktail waitress. The last one doesn't seem to be Darhk's style, nor has Darhk's shown any particularly Ray/Curtis/Felicity-level tech skills. The Calculator, Oracle's Evil Counterpart from the comics, does, and he's not a sociopath, just a mercenary The Cracker. That could fit, and he could be the top tech person within HIVE. Plus, in the comics he was revealed to be the father of Wendy and Marvin, two Canon Foreigners. He can be the dad of another Canon Foreigner here.
  • Confirmed as of "Unchained"
    • He's not tied to Dahrk, though. In fact, Dahrk tries to kill him because he's the only person that can thwart Dahrk's plans.

Deadshot is still alive, and infiltrated HIVE
It seemed like an embargo on the Suicide Squad and its members was put in place during season 3 because of the film. But Season 4's actively mentioned Deadshot a lot, shown him in brief flashbacks to past episodes, and Waller returned despite seemingly being written out. Meanwhile one of HIVE's Ghosts in the premiere spoke with a voice modulator for some reason. And in the third episode, one masked Ghost gets the drop on Diggle and has him at point-blank range with his rifle in his face, but doesn't shoot and flees the scene. Perhaps Lawton didn't die in the explosion and is trying to take down HIVE from within while Diggle tries on the outside.
  • That was Andy, not Deadshot.

Curtis Holt is not a case of Adaptation Name Change
Rather, his currently unseen husband is Michael Holt, and he is the one who will become Mr. Terrific, not Curtis.
  • Jossed, at least the second half. His husband's name is Paul.

As above, but...
Curtis mentioned having a dead brother. Apart from some very superficial similarities (being an Olympic-level athlete and genius and being a black man named "Holt"), Curtis is nothing like the comic book version of Mr. Terrific. This is because he is not Michael Holt's counterpart. Instead, the Arrowverse's version of Michael Holt was Curtis's brother, who died.

Felicity is pregnant
In the comic preview of "Beyond Redemption," Diggle says Oliver has some happy news that he wants everybody there for. It has been shown that Oliver and Felicity are a very intimate couple. It would give an excuse for Donna Smoak to return and for Felicity's father's identity to be revealed. Also, in the future, Felicity will lose the baby and this child will be the one in the grave, accounting for Oliver's return to darkness.
  • Based on the circumstances given, jossed. It doesn't seem like that is in the cards for the foreseeable future.

Darhk is bluffing Lance
After his reveal that he has a daughter of his own, and his giving honest father-to-father advice to Lance, Darhk's firing of Lonnie Machin takes on a different light. While he may yet have been firing Machin for being too chaotic, the real reason was that he was firing him for threatening someone's child to get at them, and he would not do the same to Lance. Of course, should he learn that Laurel is the Black Canary, that threat may become legitimate.
  • Jossed. His daughter and family were seen at the end of Dark Waters.

Darhk is in league with Manny and The Rising Darkness
Constantine mentions to Oliver that Lian Yu is a nexus, drawing evil towards it by its very nature, and knows about what Darhk can do. Darhk must know that Star City is also such a nexus (as compared to Central City, it is an inherent cesspool of crime and violence) and Genesis is his plan to use the nexus to open a gateway to hell in order to trigger a catastrophic battle involving Manny, the Brujeria, the Rising Darkness, and Nergal, ultimately leading to the end of the world as we know it, and triggering the "new beginning" he was talking about in "Haunted." Luckily, Constantine will be there to help prevent this and in doing so, wrap up some of the lose plotlines from his previous show, saving the rest to be resolved in passing, offscreen, or behind the scenes.

Sara's resurrection failed because she really DID give her soul to Ra's.
The league WOULD be the type to dabble in magic. What if Ra's to make sure that nobody can use the pit is to curse them? Ra's might have cursed Sara so that when she dies, her soul will separate from her body, hence why she came back soulless and her soul was trapped in The Underworld. In addition, Nyssa didn't give any other specific reasons to resurrect Sara other than the fact that she won't come back the same. Maybe it's because she was too afraid to admit that Ra's cursed Sara and other league members?

Carly Diggle will appear again only to learn the truth about her husband.
And she'll be upset John kept it from her.
  • Diggle did recently mention her and was considering calling her.
    • She appeared in some pictures in Dark Waters.
    • John will use her and her son to get through to Andy.
      • Partially jossed. John does bring them up, but Andy tells him he left that old life and he sees HIVE as his family. Though he seemed to frown when John mentioned them. We don't know if he intends to spare them from the missiles.

Andy Diggle was indeed killed, but Darhk brought him back with the waters he stole from the Lazarus Pit.
Why would a man as powerful as Damian Darhk bring some random weapons dealer back to life with the Lazarus Pit?
  • Jossed. Andy confirmed that HIVE faked his death with fake ammo. Even Deadshot didn't know about it.

Felicity won't die.
And the reason she isn't at the grave is because she learned the truth about Oliver's son at some point and broke up with him.
  • Possibly jossed. She was shot through the heart and the way the trailer is organized definitely seems to indicate that she will die.
  • Confirmed

Malcolm is going to become immortal.
In order to replace the Lazarus Pit, he'll ask Savage to make him immortal, thus making his journey to Villain Sue complete by becoming invincible.

The tattoos gifted by Constantine during the Lian Yu flashback in "Haunted" are the real reason Oliver survived his battle with Ra's in "The Climb."
While the branding placed on Oliver by the Orb of Horus (or rather, its staff) may be meant to come in handy against Darhk (though "Legends of Today" casts doubt on that, as Oliver lacks the immunity to Darhk's Touch of Death that Thea exhibited in "Brotherhood"), having a protective charm put in place years ago would better explain how Oliver was able to survive such grievous injuries that would've killed any other man; all he needed to do was nurse his wounds and tough it out with his Heroic Willpower because the tattoos managed to reduce the severity of his injuries to more manageable levels after Ra's gutted him like a fish.
  • A lot of things seemed way out of place in Legends of Today. Damian Darhk was way too cheerful, Laurel wasn't helping them take down the ghosts, etc. I'm not sure we can assume anything based on that scene.
  • It also didn't prevent Oliver from dying to a macigal nuke in the succeeding episode. While the theory is a good one, perhaps it only protects Oliver against mundane forms of injury (to which a stab through the chest with a sword qualifies)? It would explain why and how Oliver can recover from nearly everything that tries to kill him, even the things he went through in Season 1, like stabbing himself in the chest with an arrow, but maybe doesn't affect anything mystical that tries to hurt him. Reiter doesn't seem to actually have magical powers, he's just looking for them. Alternately, perhaps the tattoo simply helps him recover from wounds at a rapid rate (the Reverse-Flash did mention that Oliver lives to be really old when he dies in the future, presumably from national causes).

Alex Davis is a spy for H.I.V.E.
  • Possibly. But that's very similar to the character of Chase from last season, and I doubt the producers would do the exact same thing again.
  • Jossed. It seems like that might be the case at first towards the end, but it appears that Alex was just a normal guy until he started working for Ruve Adams. He's given the yellow pill to brainwash him, but until he started working for Ruve he wasn't a spy.

When Roy returns, he will wear the original Arrow suit.
Roy is already slated to return post the midseason premier for a couple of episodes. At some point, he goes into action with the team...and since his Arsenal suit has been modified into Thea's Speedy suit, he will instead don the original Arrow suit ('rescued' from police impound by Lance). So we get to see Arrow and Green Arrow together!
  • Jossed. He wore the Speedy outfit because Thea was out of commission.

Felicity will become Oracle.
Set photos have shown Felicity in a wheelchair. She could become paralyzed and become an Expy of Barbara Gordon.
  • Jossed, but not without Lampshade Hanging.
    • Or rather, confirmed in everything but the name Oracle.
    • Or not. She is more an Expy of Wendy Harris aka "Proxy".

How the flashbacks will relate to the present.
In past seasons, the flashbacks have tied into the main plot very closely, such as Slade and Maseo. But this year, the flashbacks seem very detached from the plot. Could Reiter be working for HIVE?
  • Reiter is revealed to be an acquaintance of Andy Diggle. Let's see what happens from here.
    • This goes nowhere. The flashbacks only tie into the main storyline because the idol Reiter uses is the same one that Dahrk uses.

Felicity died when Darhk's men shot at her
.Oliver will just be hallucinating her. His friends will continue the charade to keep him from becoming the dark killer he used to be. Especially considering how poorly he handled Thea's death in the League of Assassins plot.
  • Jossed.

There's no one in the grave.
The funeral and grave was to fake Felicity's death so as to remove her, the least combat-capable of Team Arrow, as a potential target of Darhk if it was revealed she survived the attempted assassination. Oliver still has plenty of reason to want Darhk dead, especially if she suffered some form of permanent injury, so the fact she survived doesn't change his desire for vengeance.
  • Essentially Jossed with the reveal that it absolutely isn't Felicity in the grave and she wants "him" (whoever it is) dead as well.
  • Officially jossed.
  • Replace Felicity in the OP with Laurel and this theory is very much still alive. (No pun intended)

Damien Darhk did not kill whoever the grave is for.
Oliver just says he's going to kill "him" without explicitly identifying anyone. Alternative identities of the murderer;
  • Merlyn, thus cementing his and Oliver's Status Quo from the comics.
    • Since he revealed the existence of William to Darhk, his odds have gone up.
  • Slade, who was freed from imprisonment by Darhk and set about to fulfill his promise to Oliver.
  • Quentin, whose alliance with Darhk led to the death of whoever is in the grave.
  • Anarky
  • Andy Diggle
  • Felicity's estranged father aka The Calculator
  • Reiter
  • Damien Darhk's wife. While the murderer is specifically referred to with male pronouns, it is possible that the "him" is a misdirection by the showrunners. Possible scenarios are: A.) She was wearing a heavily concealing outfit (likely a battle gear) at the time and the others didn't saw her clearly and just assumed that she's a guy. B.) The group is aware, but they mainly blame Dahrk for the deed. C.) Overlaps with Option B, as she'll eventually be revealed as The Starscream and Black Widow and deliberately arranges things to put the heat on her husband. D.) Damien Dahrk willingly takes the heat for her since it's established that he loves his family dearly.
  • Nyssa Al-Ghul, same misdirection theory as Mrs. Dahrk above, likely to Frame-Up Merlyn. Reasons she did it could either be a genuine fallout with Team Arrow or whatever twisted reason since members of The League never seems to run out of it.
    • Jossed. Nyssa has disbanded the League, undergone a Heel–Face Turn and has no reason to go after Merlyn any more.
  • The Big Bad of the following season (unless s/he's one of the aforementioned ones).
  • All jossed. While Merlyn and Andy Diggle were accomplices, Darhk killed Laurel with one of Oliver's arrows.

Felicity's hallucination is Death of the Endless from the sandman comics.
Felicity's old look from Mi T was confirmed to be based upon Death from the sandman comics. And with the existence of angels and heaven Ala Constantine, it's very possible that Felicity is hallucinating death who's teasing her about what she's become, taking on the form of a factor from her past.

Felicity's hallucination is due to Vertigo
Her hallucinations of a disproving Goth!Felicity are very similar to Laurel's of a disproving Sara. Laurel had been dosed with the drug when she started hallucinating and Felicity started after taking her pain meds. Someone slipped Vertigo into the bottle just before Oliver picked it up giving her a similar type of hallucination.
  • Jossed. Its just normal side-effects from the medication.

Damien Darhk's wife will ultimately be the Big Bad of the season.
For one, she's already shown to be more cutthroat than her husband. She was also introduced during the episode before the mid-season finale. Retroactively, all the previous Big Bads made major appearances in said episodes (S1 had Malcolm's very first outing as the Dark Archer, S2 had Slade appearing in the present day for the first time, and S3 had Ra's "killing" Oliver).
  • Jossed. Darhk is out of prison and killed Laurel. That definitely makes him the Big Bad.

Damien Darhk's wife is the Queen Bee from the comics.
Her husband is The Leader of H.I.V.E. after all.

Felicity and Curtis' Palmer Tech. saving discovery
It will be an application of Ray's nanotechnology which restores the nerve connections in Felicity's spine allowing her to walk. It will not be a regenerative tissue cure but a self generating set of micro-prosthetic connections. To-may-to / to-mah-to.
  • Jossed.

Season Four will have a Big Bad Ensemble of H.I.V.E. and Shadowspire
As of "A.W.O.L.", this seems likely.
  • Adding The Calculator to the mix, unless he's already a member of either group.
    • Shadowspire are not heavily involved in the main plot. The Calculator also ends up being an ally at the end because a skilled hacker is needed to counteract Dahrk's plot.

Lyla will become the new head of ARGUS.
And she'll use it. Assuming that John Diggle is the one to die, she'll use the full might of ARGUS to go after HIVE and Shadowspire.

Connor Hawke is the son of Diggle and Lyla.
Looking at the Legends of Tomorrow casting for Connor Hawke, this seems likely. Diggle may well be the one to go, and it could be while Lyla is pregnant again. When Connor grows up, Oliver and Laurel (probably not Felicity at this point) will take Connor under their wing and train him, and Connor will become the new Green Arrow.
  • Confirmed, his actual name is John Diggle Jr. His father died in the field at some point before the events of the episode, but considering how far in the future it was set, and the fact that it was a Bad Future due to time travel shenanigans means we can't extrapolate any useful information about Dig's death in the mainstream timeline.

Thea is the one in the grave and her code name will go to Felicity's newly discovered half-sister Stephanie Brown.
Felicity will take in her sister after sending their father to jail.
  • Jossed. Felicity doesn't seem to have a sister.

Rick Flag Jr. will be the new head of ARGUS
And he will be friendly towards Oliver and the group.
  • Jossed, it's Lyla.

Felicity will get Eobard Thawne's wheelchair.
And since it has other nifty uses, Curtis Holt may end up tinkering with and possibly upgrading it.
  • Jossed. Felicity can walk again.

Curtis Holt's new power source will become the focal point of the villains' plans right up until the season finale.
As of "Unchained", Team Arrow is facing a number of antagonists, including H.I.V.E., Shadowspire, and The Calculator. While this episode strongly implies that The Calculator is interested in this tech, whoever ends up being the ultimate Big Bad of the season will attempt to steal the technology and incorporate it into their final plan.
  • Jossed.

Brie Larvan/The Bug-Eyed Bandit is a member of H.I.V.E.
Her Animal Motif fits well with the group. That and for the Incredibly Lame Pun.
  • She's confirmed to appear in Episode 17, though whether or not she's now a member of H.I.V.E. remains to be seen.
  • Jossed. She doesn't seem to be a member of HIVE.

Oliver's son William is the one in the grave. Malcolm Merlyn is the one that Oliver needs to kill.
The ending of "Sins of the Father" seems to imply this (but once again it may just be a fakeout), although I do remember reading a YouTube comment a few weeks back (long before "Sins of the Father" aired) that theorized the first part—that it's Oliver's son who's in the grave. This way, none of the core cast needs to die, but it's still someone who Oliver (and by extension, the rest of Team Arrow) cares deeply about.
  • Jossed.

Malcom will take over as the Big Bad of the season.
With Dahrk now in prison, it seems like a possible continuation. The preview of 'Broken Hearts' implies as much, with Malcolm stating HIVE will go ahead with Genesis even without Dahrk.

An Alternate Universe of whoever will die will appear in the future.
That person doesn't have to be from Earth-2, as The Multiverse is wide. This character will either be a refugee in this universe or simply Trapped in Another World, but either way they'll end up sticking around. They have major differences with their deceased counterpart, but they'd still have their important characteristics to show that they're not so different. This will likely be the case if either Laurel, Diggle, Felicity, Thea and Roy is the ones dies since they are the characters with potential and fanbase.
  • If she's Laurel's counterpart, she'll likely be a more badass Black Canary and a metahuman with an organic sonic scream. She might even go by the name "Dinah".
  • If she's Thea's counterpart, she'll likely be the Mia Dearden version of Speedy with the former prostitute who is HIV positive background.
  • If he's Roy's counterpart, he'll be more of an Anti-Hero and sociopath and is involved the villain Cheshire. He'll also have an Arm Cannon.
  • If she's Felicity's counterpart, she'll likely be more of a gadget using Action Girl but still a computer genius.
  • If he's Diggle's counterpart, he'll likely be a version of an existing DC character. Possibly Green Lantern or Black Lightning.

The series will acknowledge that Curtis Holt keeping Team Arrow's secret from his husband could have catastrophic consequences for their relationship
Basically, Oliver and Felicity's relationship was ruined by Oliver constantly keeping secrets. As IGN suggested in their review for "Beacon of Hope", Curtis keeping Paul in the dark is eerily familiar to the problems we've seen time and time again on this series. So, either Oliver or Felicity may actually encourage Curtis to tell Paul about Team Arrow. It could actually be quite advantageous, as then Team Arrow would finally have someone on board who specializes in a form of medicine (specifically, physiotherapy).
  • The Internal Reveal finally happens in the season 5 winter finale, and as expected, the result isn't pretty.

Reiter was actually the one who massacred his village as a child.
In "Broken Hearts" he reveals to Oliver and Taiana that as a child his village was massacred, leaving him as the sole survivor. I'm wondering if we'll later see that there's far more to this story that meets the eye, and in fact he was the one who massacred everyone.

Felicity is in the grave, and the one seen is a hallucination. SPOILERS!
Even though we've seen Felicity in the car at the end, it could still be that she's the one in the grave. Every main character this season basically has had someone important to them "return from the dead." Laurel and Lance had Sara, Diggle had his brother, and Felicity had her dad return. It's also interesting that Damien Dahrk calls them "ghosts", but we've yet to see a real ghost. And Felicity even SAW HERSELF as a hallucination earlier, dressed up in dark colors (death). It's very possible that Felicity at the end was a hallucination, returning to Oliver. And here's my logic for why it couldn't be anyone else:
  • Laurel. Obviously, she's the Lois Lane to Oliver's Superman, but Oliver's currently dating Felicity. But one day, these two should probably end up back together. And while her death would upset Oliver and Felicity,, I doubt the writers would actually kill off the Black Canary.
  • Captain Lance. This seems to be a very common theory, but the reason this is unlikely is Barry barely knows him, and I doubt Barry would come to the grave if it was Captain Lance.
  • Felicity's mom. Same logic, Barry wouldn't come.
  • Thea, Oliver's son, etc... Lots of other people have almost died, and these seem like fake-outs, which makes it unlikely that it's any of them.
Therefore, the only theory that seems logical to me is that Felicity is a hallucination. There's just one other theory that might make sense...
  • Jossed

Diggle will die, and it will be Andy's fault.
Judging from the trailer, Oliver and Diggle are in the same situation as the end of last season, where Diggle thinks that Oliver has betrayed him. Diggle's death makes sense, and it would upset Oliver, Barry,, and Felicity. It would also set up the road to redemption for Andy, and he could help raise his niece.
  • Half right. Laurel died, but it was Andy's fault.

Laurel will die, but her character will live on.
This one's pretty out there, so hang on. Laurel will die and be in the grave, as many online have predicted. But this won't be the end of her character. According to the Flash, on Earth-2, Robert Queen is the Green Arrow. This idea of an "older hero" could be reflected with an older Black Canary, aka Dinah Drake Lance (Laurel's mom). On Earth-2, people who aren't metahumans on Earth-1 can be metahumans, so it's very possible that Laurel could be one on Earth-2. All of this could set up a more traditional Black Canary, who, like in the Injustice Continuity, will come to Earth-1 and start dating Oliver.
  • Laurel's Earth-2 counterpart was just cast for The Flash. Supposedly, she's the Black Siren, a similar character to Black Canary, so this could be true.
  • So far, so good. Laurel died, and her Earth-2 counterpart will be on the Flash. Word of God also says this is a possibility.
  • This is confirmed, but we don't know how her character will live on yet. Probably Earth-3 Laurel or something.

Felicity's paralysis returns
At the end of Blood Debts we have a flash forward to Oliver at the grave site entering a limo with Felicity in it looking jaundiced and with brown lips the way she had in the hospital. Next episode she is with usual clear skin with bright red lipstick. This may have been artistic license by the producers to keep up suspense for the week but assuming its real then Felicity regressed because:
  • Her body's immune system has rejected the chip leaving her paralyzed once more.
  • The attack that killed whoever is in the grave also injured her causing the chip to fail. This would also explain her anger over and above that for whoever was killed.
  • During that attack, she was targeted so the attacker could remove the chip for their own purposes the way Brie Larvan tried. It is a sophisticated piece of technology and may have more potential uses than just curing paralysis.
  • Seemingly jossed. Felicity had nothing to do with the death.
    • Point 1 still possible and other two could still happen in a second attack prior to the funeral.

Darhk's ring
The ring Darhk takes out of his mouth at the end of Broken Hearts is not magic but his wedding ring. He just loves his wife that much.
  • This troper also thought it was weird that nothing came of that twist. And now that Darhk's out of jail it seems less likely that this will be addressed.

Baron Reiter and Damian Darhk are the same person.
It was revealed that Reiter's idol is the same one that Darhk uses. This seems suspicious on its own, and it's also weird that Darhk has only appeared in the present and Reiter has only appeared in the past. Except for one appearance on Legends (which could easily be retconned), it's very possible that Reiter and Darhk are the same person. They both have the same obsession with magic, and it would explain some of Darhk's hate for Oliver Queen. In order to become Darhk, Reiter will undergo a Magical Transformation to change his appearance.
  • Jossed by Darkh's appearance in 1975 over on Legends of Tomorrow, looking exactly the same as he does now.

Oliver's promise to Laurel
Before she died, Laurel made Oliver promise her something, and the camera pans out and we don't learn what it is. Laurel made Oliver promise:
  • He would marry Felicity.
  • He would help her fake her death. And he did
  • He would take down Darhk.
  • He would look for Evelyn, her daughter.
  • All jossed. Laurel makes Oliver promise that she won't be the last Canary on the team.

The season four finale
I get the feeling the final climax will be three separate battles that cut back and forth between each other: Thea vs. her father, John vs. his brother, and Oliver vs. Darhk (with some help from Quentin).
  • Partially Jossed, given that Andy is killed by John in the fourth-last episode of the season.

Team Arrow will be disbanded in the season finale
The title for 4x23 "Schism" seems to suggest as much. Consider this-
  • Diggle is heading down a very dark revenge-fueled path that may well preclude him being able to serve as a 'hero' in Star City. Perhaps he'll choose to leave Star City for a while, maybe joining Lyla at ARGUS.
  • Thea may well have had enough of the vigilante life after everything that's happened to her over the last four years. She'll leave either to go to college, or to be with Alex, or perhaps to hunt a fugitive Malcolm.
  • Felicity had already quit the team and decided to devote her time fully to Palmer Tech, and while she may temporarily return in the wake of Laurel's death, she may also choose to leave again once Darkh and HIVE have been defeated.
Thus the season will end with a reversal of the status quo with which it began - instead of Oliver having retired and the others being active (including Felicity, on the sly), now the others have retired (or died) and Oliver is the only one left in the crusade he started.
  • Confirmed for everyone but Felicity. Felicity quit the team at first, but she returns before the end and stays. Diggle, Thea, and Lance all leave, and Laurel was considering leaving before she died.

Quentin will start learning Magic to deal with Darkh
He will then start using a staff and change his name to Harry and open up his own private detective agency.
  • Jossed.

Oliver won't kill Damien Darkh
Instead he will make him watch as he kills Ruve
  • Jossed. Especially the last part: Anarchy kills Ruve.

Evelyn is Laurel's Biological Daughter.
It would explain how she was able to get the Canary Cry to work for her. She also would somehow have to have known that Laurel was the Black Canary, in order to know to steal the Canary Cry (and she already had a Black Canary costume). Laurel's tombstone said she was born in 1985, so this would have to have been a teenage pregnancy. That would also explain why she was put up for adoption, and had different parents. It's also possible Darhk went after her because she's Laurel's daughter. And finally, this would tie into Laurel's promise. She could have told Oliver to look for her daughter, which is Evelyn.
  • This is still technically possible, but she's 16. Laurel would've had to have gotten pregnant when she was 15. Which is possible... but not very likely.

Evelyn is Sara's daughter from a time travel trip to the 90s.
At some point in their travels, Sara and the team will travel to the year 1998-1999. Here, Sara will fall in love and have a baby, but she will be forced to give her up to continue her hero work. Evelyn will be adopted, and grow up to have vocal chords similar enough to use the Canary Cry.

Ruvé Adams and Taiana are sisters.
Taiana mentions having a sister. She told Oliver to see her if Taiana doesn't make it. Taiana gets killed by Baron Reiter. Ruvé blame Oliver/Arrow for her death. Hence siding with Damian's agenda.

Evelyn is a metahuman.
She doesn't actually need the Canary Cry, she just stole it in order to hide the fact that she's a metahuman. It would also explain why she was somewhat immune to HIVE's control (she was able to escape).

Denis is a Ghost.
That's why he was so insistent on getting rid of Felicity.

Darhk will get even more magic powers before he is killed.

     "James" in Season 5 
According to early reports, Season 5 will feature a character named "James" who may be a Shadow Archetype to Ollie—in effect, it almost seems like the writers are trying to heavily borrow from The Punisher's storyline in Daredevil (2015) season 2. The question is, is James a canonical DC character, and if so, who?
  • All jossed. "James" is actually Adrian Cross, aka Vigilante.

"James" is related to the man Robert Queen killed at the Foundry
Tying off a loose end introduced way back in 1x21 ('The Undertaking'), where Robert confessed to Moira that he got involved with Malcolm's group in order to atone for the fact that he inadvertently killed a corrupt Glades official. "James" is either the son or the brother of this man, who is determined to seek revenge for his father/brother's death. He may begin the season unaware of who the murderer was and embark on his own quest to discover the truth. He may even initially be an ally of Oliver's (or the Green Arrow's) least up until he discovers who his father/brother's murderer really was. It was also be a shocking reveal for Oliver to learn the truth about his father's "original sin", which was the beginning of everything that happened to their family. It will also be a nice way to bring the series (or at least the initial 'five year plan' for it) full circle by harking back to the Season 1 storyline of Oliver wanting to atone for his father's sins.
  • Jossed.

"James" is Prometheus

Or the Arrowverse's approximation of him. He's caused trouble for both the Arrow family and the Justice League at large, even causing the loss of Roy Harper's arm and starting him on his downward spiral of erectile dysfunction and beating people with dead cats. Oliver put an arrow between his eyes as revenge which had it's own batch of consequences. He'd be a good physical match and moral challenge for Oliver on top of a mutually tragic origin, fulfilling his role from the comics.

  • Jossed.

"James" is a character based on the original Merlyn, Arthur King.
  • Jossed.

Malcolm will be an Evil Mentor to "James"
Since Malcolm is obviously never going to pay for his crimes, chances are good that he'll join up with the next big villain. And what better way than to become an Evil Mentor to the new villain the way he never could for Thea? Malcolm will even start to see him as the evil child he never got from Thea or Tommy.
  • Whelp, Malcolm being a Karma Houdini once again is confirmed at least.
  • Jossed.

"James" is Vigilante.

     Season Five Theories 

Oliver's discovery on Lian Yu will be explained as a cover up he arranged with the Bratva to avoid the complications of simply hopping on a plane and turning up at home.

He's gotta have some explanation, right? The only logical way to hide most of those years is to return t the island.

Oliver will design and create The Hood for his war on Konstantin Kovar with the help of the Bratva and Talia Al Ghul.

  • The title of episode 17 is 'Kapot,' Russian for 'hood.'
  • She has his season 1 bow.
  • Seemingly confirmed as off 5x11 - though its Talia who inspires him to create the persona, and not just to deal with Kovar.

The entire continuity of the show will change because The Flash is doing Flashpoint.
Just like in the Flashpoint comic the entire continuity of the shared universe gets rewritten. Changes may include:
  • Laurel coming back from the dead
  • A darker version of Arrow
  • Felicity is written out
Feel free to add your own guesses.
  • All jossed. Flashpoint is not going to affect Arrow in a major way.

Lance will return to Star City to serve as Oliver's Deputy Mayor
Since obviously Paul Blackthorne isn't leaving the show. It will also help if Oliver has someone by his side who actually has some kind of experience in administration. Plus, it will further develop the father-son dynamic they were starting to have in Season 4.
  • Confirmed!

In the flashbacks, Oliver will cross the first name of the List
In Russia, while working with the Bratva, Oliver comes across someone from Starling City who's name is in his father's notebook (which we see him intermittently going through throughout the season as he ponders his father's mission and whether or not to go back). Discovering the shady dealings of this person back in Starling as well as the horrible things he's involved in currently (which may have something to do with the primary story of the flashbacks), Oliver suits up in the green hood, confronts the man, and takes him down (possibly killing him), crossing the first name of the list. This is when Oliver gets the idea of using his hooded vigilante persona to carry out his father's mission.
  • The list does come up. this is totally possible.
    • Confirmed! In the flashbacks of 5x12 "Bratva", Oliver takes down a drug-dealer from Starling City who visits Russia, and crosses the first name off the List.

Roy will be an ARGUS agent when he returns
Mirroring the period of time in the comics when he worked as a covert operative. This might also lead to his name being 'cleared' of being the Arrow/dead, and being able to live in Star City publicly.

Lance (and possibly Donna) will adopt Evelyn.
Because it would fit well with their characters. Lance has lost Laurel and needs a daughter to inspire him and give him purpose, and since Sara's on the run, Evelyn would be a nice fit. Evelyn also lost her parents to HIVE and needs guidance, so these two would be a good match for each other.
  • Well... Donna and Lance have broken up between seasons.

Vigilante will not be the main villain of Season 5.
In the same way that Punisher wasn't the main villain of Daredevil Season 2. He'll show up, become Vigilante, but all the while there will be a bigger threat in the background that Oliver and he will have to deal with. (After all, something has to cause a tragedy for him.)
  • Was Vigilante ever indicated to be a major villain, let alone the main villain? He's likely going to tread the line between hero and villain.

As a result of events on The Flash, Laurel will return.
There's two different possibilities for this.
  • Laurel's Earth-2 Counterpart could have a Heel–Face Turn and join Team Arrow, allowing Laurel to return.
  • Due to Flashpoint, Laurel will return from the dead or her counterpart will become her.
Either way, this would result in a Black Canary who actually has a sonic scream as her power.
  • Laurel will probably join from another Earth. However, due to the nature of her status in Star City, a new Laurel cannot show up and become a public figure, so she'd more likely become a major recurring character on Legends and Flash, only showing up once in a while on Arrow. Flashpoint definitely will not bring her back either as Flashpoint doesn't affect Arrow heavily.
  • Episode Nine ends with Oliver finding an alive Laurel in the Arrowcave. Could it be the Laurel from the Dominator's mind control world, somehow physically manifested, who arrived at that location after exploring an entirely different world to the one she knows?

Chad Coleman's Big Bad character, Tobias Church, is an Adaptation Name Change for Tobias Whale.

Secrets from Oliver's past will be exposed, leading to him resigning the mayorship
A new reporter character, Susan Williams, has been announced and she's be targeting Mayor Queen in her story. Its possible that Susan ends up digging some real dirt on Oliver - either the fact that he's Green Arrow, he's allied to Green Arrow, or his connections to the Bratva. This expose results in him resigning (much as in the original comic story, where he resigns because it became publicly known he sponsored the Outsiders). Resulting from this...
  • Episode 5x05 ("Human Target") has developments that lend credence to this WMG - Susan Williams receives evidence that Oliver Queen was in Russia in 2011, at a time when he was supposed to still be stranded on Lian Yu.

Lance ends up as Mayor of Star City
Combining the above WMG with the one about Lance being Oliver's Deputy Mayor. (This again mirrors the comics, where Oliver ensures that one of his friends and allies becomes the new mayor).

Due to the Flash, we will see very different versions of the characters based on the comic version of Flashpoint
  • Robert Queen will be the show's version of Thomas Wayne and this continuity's "Green Arrow"
  • Moira Queen will be the show's version of Martha Wayne and this continuity's "Dark Archer"
  • as such Oliver Queen will be dead in this timeline
    • Jossed. No Arrow characters appear during Flashpoint. However, Robert Queen has been teased for the crossover.

Reports say that a character we haven't seen in 2 whole seasons will return. Possibilities include: (feel free to add more)
  • Anatoly Knyazev
    • almost a guarantee, as it is strongly implied that Ollie is headed for Russia in this season's flashbacks to keep his promise to Taiana, as well as learn Russian and join the Bratva as we know he did at some point before Season 1. The real question is whether he will appear in the present-day storyline as well.
      • Confirmed by the SDCC trailer.
  • Cyrus Gold, this time as Solomon Grundy
  • Walter Steele
  • Helena Bertinelli/Huntress
    • Could be a replacement for Black Canary
  • Sin, possibly as a friend of Evelyn's

Curtis will become Mister Terrific by the season's end.

Curtis' father is named Michael and is a famous scientist who works for Ted Kord

Oliver will kill someone in the present-day in the season premiere
The latest promo reveals Oliver being abducted, tied to a chair, and beaten up in a Call-Back to the pilot. Chances are that the sequence unfolds identically to the pilot, with Oliver breaking free, pursuing his attackers and breaking one of their necks while saying "Nobody can know my secret"...only this time, he will be more conflicted about what he's done.
  • Confirmed. He kills a cop who looks an awful lot like Tommy Merlyn.

Black Siren will be the new Black Canary
So the Season 5 premiere revealed that Laurel's last words to Oliver were to not let her be the 'last Canary'...and that if she had a successor, she would feel like a part of her was still "out there with [him]". No doubt this is something that will eventually be explored further. But the only other candidate for the mantle we have around is Evelyn Sharp, who's becoming Artemis. However...there is one other candidate who is actually pretty obvious...Laurel's very own Earth 2 counterpart AKA Black Siren, who is currently cooling her heels in the Pipeline over at STAR Labs. And there are a lot of points in favor of this not being a particularly 'wild' guess-
  • Katie Cassidy is scheduled to return in the 100th episode of Arrow, which is the four-way mega crossover. Chances are that Team Arrow encounters Black Siren during that time.
  • She's also scheduled to appear in the midseason premiere of Arrow. That also makes sense...after being introduced to Earth 2 Laurel during the crossover, this is when she shows up in Star City and Oliver and the others really get to know her.
  • Word of God says that Laurel will be 'resurrected' in a way this season...this would be the best way to do that and not have it be an Ass Pull.
  • Given that E2 Laurel is currently a villain, it would be a nice redemption arc, that in a way parallels Oliver's own efforts to move forward with his life.
  • There's a precedence for this in the comics - in the pre-Crisis on Infinite Earths continuity, Black Canary was originally from Earth 2, and then moved to Earth 1 by the time she began her relationship with Green Arrow.
  • Black Canary made her debut in a Flash comic as The Mole to the bad guys, while Black Siren made hers in the penultimate episode of Flash Season 2 as The Dragon and the season's final Villain of the Week. Notably different, yet strong parallelism.
  • This would also effectively 'reboot' Black Canary to a more comics accurate version - complete with a real 'Canary cry'.
  • Robert Queen is also supposed to show up in the 100th episode. The crashing of the Queen's Gambit along with the deaths of both Oliver and Sara could've been what drove Earth-2 Laurel into becoming Black Siren, and Robert Queen's involvement might help her to get over this.
What better way would there be to honour Laurel's legacy than for Oliver to take in and reform a version of her who's lost in darkness and forge her into a hero worthy of the 'Black Canary' name. And this way, Laurel truly will be out there with Oliver, even in death.

The Bratva were the prospective buyers of the stolen nuke in Chechnya

The nuke that Diggle's rogue commanding officer was planning to sell to an unknown buyer that didn't show up. The buyers in question were the Bratva. Either Anatoly himself, or some other major figure. This will be how the Bratva gets involved in the present-day arc. Oliver will either have to work with Anatoly, or possibly against him, in order to clear Diggle's name and bring down the rogue commander.

Scimitar is ...

Wade Wilson, Slade's half brother.

Or Hal Jordan.

He has trouble remembering.

Vigilante is not Adrian Chase

  • In the comics, Adrian Chase and his masked persona "Vigilante" are one and the same. Season 5 of Arrow introduces a new district attorney named Adrian Chase, and the seventh episode of the season entitled "Vigilante" introduces the titular character, but does not reveal his identity. It's possible that the writers want the viewers to expect that things unfold as in the comics and so Vigilante's reveal as Adrian Chase will be a Captain Obvious Reveal, but in fact it may turn out to be a Not His Sled moment, with Vigilante actually being someone different in this continuity—the episode's sole scene with Adrian Chase may just be a Red Herring.
    • The trailer for 5x16 supports this, as it shows The Vigilante coming after Oliver for his "corrpution" following the public reveal that he covered up The Green Arrow's involvement in Detective Malone's murder. Chase would have no reason to target Oliver for that, since he participated in the cover-up himself.
    • Confirmed in the above-mentioned episode, "Fighting Fire With Fire".note  Halfway through the episode, Prometheus fights Vigilante on who gets to take down Oliver Queen...and then Prometheus is shown to be Adrian Chase, meaning Vigilante is someone else.

In the 100th episode, Oliver will be possessed by the Black Mercy

We already know that in the episode, which is part of the "Invasion!" crossover, that Oliver finds himself in a Lotus-Eater Machine. Presumably, the Dominators put him in there, and this would be the best way for them to do it. Especially since Supergirl would have experience and would know how to help.

  • Jossed.

Laurel at the end of "What We Leave Behind" is...
Black Siren AKA Earth 2 Dinah Laurel Lance, impersonating her Earth 1 counterpart. At some point, Black Siren escaped from the Pipeline (or maybe in the Post-Flashpoint timeline, she simply was never imprisoned there and managed to escape from the scene before Team Flash could take her into custody). She spent several months studying Team Arrow on this earth, and her Earth 1 counterparts life, and then decided to begin a new life on Earth 1 by stealing the deceased Laurel's life. So she shows up at the Arrowcave, posing as a resurrected Laurel, and hoping to pursue a relationship with the doppelganger of her deceased boyfriend. As she gains Oliver and Team Arrow's trust and sinks into the role of Black Canary, she gradually pulls a Heel–Face Turn and becomes a hero...eventually revealing to Oliver who she really is. By that point of course Oliver has fallen in love with her and is prepared to forgive her and accept her as Laurel. The others on the team...may have differing views on that.
  • The trailer for the following episode, "Who Are You?", strongly implies that it is indeed Black Siren, who is still evil but initially disguised as the heroic Earth-1 Laurel. There have been rumours that Redditors have access to the episode's script, which says that in fact Prometheus was the one who released her from the pipeline in order to infiltrate Team Arrow, which if true, is a whole new level of cruelty for him.
    • Confirmed!

Laurel's return is caused by parallel events on Legends of Tomorrow
In the second season premiere of Legends of Tomorrow Sara notes that if she kills Damien Darhk in the past then Laurel will never be killed in 2016. As of writing this, the midseason finale of Legends of Tomorrow has yet to air (still about an hour and a half away), but while the full Legion of Doom may be formed, Darhk may actually be killed by the end of the episode, which will bring back Laurel. Or, alternatively, Darhk doesn't necessarily die in Lo T—at least not so soon—but at the end of the episode "Compromised", Eobard Thawne plucked him from 1987 to join him on his evil time-travelling adventures. This act changed Damien Darhk's destiny, because he no longer just sticks around until 2015-2016 to begin his siege on Star City, but is now off with the Legion of Doom—thus, he isn't around in 2016 to kill Laurel, and so she's back. Nice Job Fixing It, Villain by Eobard Thawne, indeed.
  • Jossed. Though time-travel by the Legends is part of Black Siren's cover story.

Prometheus will eventually try and force Evelyn to kill one of her teammates
At some point, one of Team Arrow's members will be captured (unlikely Oliver himself) by Prometheus, who will then instruct Evelyn to prove her loyalty to him by executing them, probably using her signature bow and arrow. This is a very common scenario in fiction, though the result could go a bunch of different ways:

—Evelyn will hesitate, but then will ultimately fire the arrow, though it's unlikely that character will actually be killed (there may be a Big Damn Heroes moment).

—Evelyn will hesitate and will be unable to go through with it, so Prometheus kills her.

—Evelyn will ultimately turn around and fire the arrow at Prometheus.

  • Jossed. She's completely devoted to Chase, even if it means kidnapping a little boy and his mother and potentially murder them.

'Tina Bolland' is related to Laurel and Sara
5X11 SPOILERS - 'Tina Bolland' is in fact the cover-name of Dinah Drake. It seems somewhat coincidental for there to be two Dinah Drakes (both of whom are from Central City). What's more likely is that Dinah Drake is related to Laurel and Sara's mom (who's also Dinah Drake). 'Dinah' might be a common name in the Drake family. This would make the new Black Canary a cousin to the previous two.

Vigilante's true identity isn't Adrian Chase, but rather Justin Claybourne's son
Going back to my theory above about how the writers will pull a twist in that (unlike in the comics) Adrian Chase and Vigilante are not one and the same in Arrow, they will unmask Vigilante and end up finding out that he, in fact, is Justin Claybourne's son. This will immediately give Team Arrow an Oh, Crap! moment, as they then realize that Prometheus is in fact someone else.
  • In a way, it would kinda make sense. Team Arrow assumes that the son of Justin Claybourne would want revenge on the man who killed his father. In fact, the opposite might actually be true—Claybourne's son may have been disgusted by his father's corruption and may have even idolized The Hood for executing a criminal—his own father—on sight, and was thus inspired to do the same thing himself four years later.
    • Vigilante not being Adrian Chase is confirmed. But Vigilante is not Justin Claybourne's son, as it seems that Chase is Claybourne's son

How Season 5 could end...
There's a rumor that the Arrowverse will introduce a certain Dark superhero. It's been teased by Supergirl a couple of times, but picture this...

Oliver and his team are celebrating after defeating Prometheus. We're nearing the end of the episode, it's all happy and laughs. Then Oliver gets a call from an intern at the mayor's office.

Sir, there's someone in your office. He won't leave. I was going to call security, but...

I'll be right there.

Cut to city hall, and Oliver striding forward all powerful and in charge. He shoves open the doors, hard.

Who the hell are you?

A man in a suit is standing in front of Oliver's desk, playing with what appears to be a bat-themed knickknack. He is tall, broad shouldered, fairly imposing.

You've done well for yourself. Made your mother and father proud, I imagine. I'm concerned with my family's legacy, too.

The man slowly turns around.

Oliver Queen? My name is Bruce Wayne.

  • Jossed.

Vigilante is not Adrian Chase. However, Adrian will ultimately become inspired by Vigilante, such that after Vigilante's downfall Adrian takes up the mantle as the second Vigilante.

I've written up a couple theories before here in this section about how I think Adrian and Vigilante really are two different people, unlike in the comics. It's possible here that Adrian will effectively be an expy for Harvey Dent, in that he's initially an upstanding district attorney but eventually suffers a traumatic incident, and as a result becomes involved with the world of costumed "freaks". This traumatic incident likely has something to do with the first Vigilante being caught (or possibly killed, like by Prometheus). This would also fit into the overarching theme of season 5: legacy.

  • Seemingly Jossed upon the reveal that he's Prometheus

Nora Darhk—Damien Darhk's daughter—will ultimately be recruited to be part of the revenge scheme of Prometheus and Talia

In the episode "Checkmate", it is revealed that not only does Adrian Chase want revenge on Oliver for killing his dad—Justin Claybourne—but that Taia al-Ghul also wants revenge on Oliver for killing her father back in season 3. So I asked myself: who else has Oliver killed whose family would want to seek revenge? The answer: Nora Darhk. We don't know what happened to her following the season 4 finale, but given that her dad was a victim of Oliver Queen, it's understandable she'd want revenge, and that Prometheus and Talia would take an interest in that. Granted, it may be difficult for her to work alongside Evelyn, who wanted revenge on Damien Darhk for killing her family. Of course, also, she is just a young child...

  • On the other hand, it's possible that this won't happen at all, but after the main conflict has wrapped up in the season finale, Oliver specifically seeks her out in order to try and make amends with her however he can, to ensure that in the future he does not have a repeat example of Prometheus and Talia.

Prometheus will ultimately be killed by Vigilante

We ultimately have to wonder how Prometheus will be defeated. Will be killed by Oliver? Will he be imprisoned at Iron Heights? Will he be imprisoned at A.R.G.U.S.? And for that matter, what about Talia? My theory is that in the end, Adrian will be publicly exposed for his horrible crimes, and thus he will effectively be put in Vigilante's crosshairs—both metaphorically and literally. Oliver will defeat Prometheus in battle, but instead of either finishing Prometheus off or sending him off to the authorities, Oliver has Vigilante do the dirty work for him instead. Again, may also possibly apply to Talia.

  • As of the end of "Disbanded", Adrian Chase has been publicly outed as the serial killer Prometheus. Given that Vigilante previously tried to kill Mayor Queen when he only suspected that he was corrupt, this theory now seems more plausible than ever.
  • Jossed.

Prometheus used to be motivated by revenge on Oliver for killing his father, but now is more motivated by the thrill of the hunt

While Prometheus' initial motivations to destroy Oliver may have come from wanting revenge on Oliver for killing his father, based on how low he's stooped in pursuit of this goal, it's possible he now simply enjoys everything he's doing and hence why he had no qualms murdering his own wife—he is solely motivated by the thrill of breaking Star City's protector, and one of the most powerful badasses in the world. Again, this calls to mind Iago. The funny thing is that, much like Talia, this actually brings back memories of season 3—part of the reason Oliver himself wanted to fight Ra's Al Ghul was so he could prove that he was the World's Best Warrior. Now Prometheus is paying it forward, albeit in a considerably crueler way.

Talia will be revealed as leading Helix

And, since she is revealed to be working with Prometheus, she is planning to use the information and hacking for a bigger scheme in the endgame of the season.

Oliver will lure Kovar to Lian Yu in the flashbacks

Word of God has teased that when Oliver returns to Lian Yu in the flashbacks, he won't be returning alone. Its very likely that Oliver lures Kovar to Lian Yu, in order to fight him on familiar territory. Oliver probably destroys whatever transportation Kovar and his men (if any) came in, stranding them all on the island, and then kills Kovar's men, and finally, Kovar himself. After that, Oliver is stranded on Lian Yu again...until a few months later, as arranged by Anatoly, the fishing boat happens to wander into view, setting up the opening moments of the pilot...

  • Jossed. Oliver returns to Lian Yu with Anatoly to stage his 'rescue'. Kovar was already waiting for him there and ambushes him after Anatoly leaves.

The final confrontation between Green Arrow and Prometheus...

...will take place on Lian Yu, bringing the five-year story of the series full circle. (Possibly with jump-cuts, much like the Season 2 finale, to the flashbacks, where Oliver fights Kovar on the island, if the above WMG comes true).

  • Confirmed.

Oliver will visit Robert Queen's grave on Lian Yu one more time

Possibly as the very last moment of Season 5 in the present-day, before the last flashback that replays the opening moments of the pilot. Oliver speaks to his father, saying that he saved the city, and laying the List to rest on the grave.

  • In 5x21 he revisits the grave with Anatoly in the flashbacks. Its possible he might still do so in 5x23 in the present-day.

Anatoly will die in the present

The episode "Kapiushon" shows the flashbacks where Anatoly actually acts as a Morality Chain to Oliver, and his only true friend in the flashbacks who remains alive in the present-day as well. The promo for the following episode, "Disbanded", shows Oliver recruiting the Bratva (including Anatoly) to try and kill Adrian. Naturally, since we're still quite a few episodes away from the season finale, they will be unsuccessful in doing so. It would really twist the knife even further to have Adrian murder Anatoly, or something even worse. Besides, in every season up until now a major heroic character with strong emotional ties to Oliver has died in the present-day: Tommy in season 1, Moira in season 2, Sara in season 3, and Laurel in season 4. I think Anatoly is the most likely candidate. Of course, even if he dies in the present long before the season finale (possibly as soon as "Disbanded"), David Nykl will still continue to portray him in the flashbacks.

There'll be a Designated Girl Fight between Dinah Drake and Evelyn Sharp.
  • Jossed.

Oliver will kill Adrian with the knife he left him.
A little cliche, but it would fit, Irony and all.

The flashback events of "What We Leave Behind" did not occur pre-Flashpoint.
This would be the perfect excuse as to why we didn't see them during season 1. Plus, it would tie the inter-show continuity together better, by having Flashpoint affect each Earth-1 show:
  • The Flash, of course, has the whole plot with Savitar.
  • Legends of Tomorrow features the post-Flashpoint Reverse Flash as one of its main villains.
  • Arrow's villain's backstory would be one of the changes caused by undoing Flashpoint.

The corpse sent to the mayor's office in "Honor Thy Fathers"... that of the man Robert Queen accidentally killed in the Foundry years ago, as mentioned in 1x21 ('The Undertaking'). This one death is what really started the chain of events that led to Robert giving Oliver the mission to 'right his wrongs'.
  • Confirmed

     Prometheus Theories (Season 5) 

Prometheus is someone from the flashbacks to Russia, and may be someone we do or don't know.

  • Oliver notes that Prometheus appears to have shared a mentor with him, specifically one Oliver met in Russia.
  • This is probably Talia al Ghul, who will appear in the flashbacks.
  • Almost no information about Prometheus is solid. He (or she) is highly trained, obsessed either with Oliver or the Green Arrow, and more interested in making a point than straight up murder/revenge. That's it. Every other detail is obscured in some way. The picture of Claybourne's son may well be a plant to mislead Team Arrow. Prometheus may simply have been lying about waiting 'four years' to repay Oliver's sins.

Based on this, it could be that, in the flashbacks, Oliver destroyed someone's life without meaning to, and possibly without even knowing. By the time Prometheus is unmasked (if at all), we may just be treated to total confusion on Oliver's part, and a long sequence of Severus Snape-style flashbacks, revealing Prometheus's reasons to go after Oliver.


  • Possibly Jossed, possibly confirmed. He is Adrian Chase, though in the promo for Episode 16, Talia says he "calls himself Prometheus," so it may not be his real name.

Prometheus is Roy Harper
He looks too much like Merlyn for it to be that obvious. Colton Haynes is becoming increasingly popular, and his profile boost since coming out is surely something Berlanti et al. would want to capitalise on; perhaps by throwing him back into the fray as a villain? Also, think of how much fun that would be! The angst! The Stephen Amell Nitrate when arrow and arsenal fight over whatever happenned to Roy in his time off. It would give a no longer *dark* Thea something interesting to do as well; other than follow her bro around talking about how good it is that she's not in uniform anymore.
  • Jossed. He is Adrian Chase.

Prometheus is Malcolm Merlyn
His attire is close enough to the Dark Archer's and his obsession with Oliver could be him trying to get payback for chopping off his hand. Given how easily he dispatched Church (who gave Ollie a good fight), he might also have done some training to fill the gap between him and Ollie. And given how much the writers seem to like Malcolm, it would be a clever part to re-introduce him. (Part of me really hopes he is it, not because I like Malcolm, but because I finally want to see him bite the dust.)
  • Prometheus is more likely to be a resurrected Tommy Merlyn than Malcolm, and frankly I don't think that's very likely either. Malcolm is more than likely going to play a bigger role on Legends of Tomorow this season than Arrow, and they tend not to reuse big bads.
  • Jossed. He is Adrian Chase.

Prometheus is Helena Bertinelli
Most people prefer the idea of it being Tommy Merlyn, but the logic behind Tommy surviving and going rogue are all extremely questionable. After three seasons, we're finally seeing the Bertinelli's show up again. The new Bertinelli heir Pino (an actual comic book character) was killed by Tobias Church, The List showed up again in the first episode flashbacks, and Frank Bertinelli is named dropped in the same flashbacks.

Helena is still alive and could come to the conclusion Oliver failed in his duty by abandoning The List. She either broke out of prison or was released on parole. To find herself and her place in the world she joined the League of Assassins at some point, or perhaps ended up under the tutelage of the currently MIA Talia al Ghul.

Prometheus clearly uses a voice synthesizer and is fully covered from head to toe, and ultimately there is no requirement that Prometheus has to be a male. Prometheus is only stated to have connections to something Oliver did back in Season 1 and that Oliver will be surprised when he sees Prometheus' true identity. Both of these apply to Helena and Tommy, but Helena is more easily able to be worked into the storyline due to not being dead and having actual reasons and motivations as to why she may come to hate Oliver.

  • Jossed. He is Adrian Chase.

Prometheus is Yao Fei

Promotional materials told us Prometheus has connections to something Oliver did back in Season 1 and that Oliver will be surprised when he sees Prometheus' true identity. Well, who says they have to mean the <i>present day</i> storyline in Season One? Additionally, Prometheus's hooded look is very similar to the Green Arrow', the look that was originally inspired by Yao Fei. Plus, Yao Fei is already known to be a deadly archer and competent fighter.

  • As awesome as that theory sounds, its likely Jossed by the fact that Word of God has already stated that the villain will somehow be a consequence of Oliver's activities as a lethal vigilante in Season 1.
  • Jossed. He is Adrian Chase.

Prometheus isn't a character whose appeared before, but who has a relationship to one who has.
  • Prometheus is Shado's twin sister, Mei. Similar to the Yao Fei theory above, Prometheus wears a hood which was worn by her late father and twin sister. And while she's not angry at Oliver for their deaths, remember that she does not know the whole story. She might have gone apeshit similar to Slade. Speaking of which, there goes my additional theory. Another reason she hates Oliver is because Slade raped her by treating her as a Replacement Goldfish for Shado and blames her and her family's misfortunes on him (Ollie). Remember, Slade was in Macau before going to Star(ling), which is near Hong Kong. And Slade did managed to find an old home video of Shado in Season 2, which was likely only held by relatives. And if you look closely at Grant Wilson's appearance, he looks very much like someone with a mixed ancestry which includes Asian, which doesn't look good for her if this second theory is correct. Grant also mentions that Slade is a Disappeared Dad, meaning Slade couldn't have trained him. If Mei is indeed Prometheus, it will make sense if she was the one who trained him. Also, Grant knowing Star(ling) City inside and out makes a lot more sense since both his parents attempted to siege it.
  • Jossed. He is Adrian Chase.

Prometheus will be a Disc-One Final Boss
.One of the major complaints about Season 4 was that Darhk overstayed his welcome as a result of being introduced too early, so hopefully the writers have the sense not to repeat that mistake this season.
  • Jossed. Church was actually the lesser bad, and Prometheus is now the pre-eminent threat.

Prometheus was trained by Talia al Ghul
Talia al Ghul is set to become a recurring character on the show in the latter half of the season. Now while Talia's appearance immediately brings to mind Ra's al Ghul and the League of Assassins, the description given for her seems to indicate she's more of an independent player carving out her own path. What better way to bring her into the story, and Oliver's world, than by having her be the person who trained Prometheus (whoever he or she is). It would explain Prometheus being such a lethal warrior and assassin and true Worthy Opponent to Oliver.
  • Alternatively, Prometheus is Talia herself.
  • Confirmed. Chase sought out Talia to train for revenge against Oliver.

Prometheus is related to someone on The List
This is almost confirmed actually, given that the List appears in the promo for 5x06 ("So It Begins"). Prometheus is related to someone who was targeted by the Hood in Season 1, because he/she was on the List. Somehow, Prometheus has learned about the List and thus figured out the nature of Green Arrow's crusade in Season 1 (and possibly, his identity as well). This would be a perfect way of making the List relevant again after over three seasons - not to mention the fact that the List has already been brought up in the Season 5 flashbacks and will likely become more relevant to that narrative as time passes.

Prometheus is the Earth-2 Robert Queen
Due to Barry's wibbly wobbly, timey wimey shenanigans, he is somehow transitioned to Earth-1. He is outraged that Oliver "Failed this city" by not finishing The List and so is out to get him and then finish the job himself.
  • Jossed. He is Adrian Chase.

Prometheus will defeat Green Arrow in their first one-on-one fight...
And to rub salt in the wound, Prometheus will proceed to tell Oliver "You have failed this city!"
  • Jossed.

Prometheus is someone or something using Quentin's body

At the end of the episode "So It Begins", Quentin wakes up and finds a throwing star near him, along with a gash along his arm—the same place where Artemis had attacked him earlier in the episode. In the following episode, "Vigilante", he discusses this with the heroes, and they agree that someone is trying to frame him. I highly doubt it's that simple. My guess is that the Arrowverse is essentially doing its own version of Batman Beyond: Return of the Joker, whereby there is a microchip or possibly a magical spell that is controlling Quentin, turning him into Prometheus whenever he loses consciousness and effectively his subconscious takes over, without him ever even realizing it. Thus, whoever is responsible for doing this to him is the REAL bad guy, the puppet master controlling the strings. Word of God says that Prometheus was born out of something Oliver did back in season 1, so I'm guessing it's unlikely that it is a magical spell controlling Quentin (since magic wasn't present in season 1), but more likely a microchip of some sort, as in Return Of The Joker.

  • Jossed. He is Adrian Chase.
  • Unless whoever was using Quentin's body switched to Chase.

Prometheus will pull a You Have Failed Me on Artemis after her cover as The Mole is blown.
  • Seemingly Jossed. They simply escaped, and we have no idea what happened to Evelyn.

Prometheus isn't Claybourne's son.
He's re-staging the Hood's most notable killings from Season 1 as a way of forcing Oliver to confront his murderous past. Claybourne's death just happened to be the first one Prometheus re-staged, while the picture of Claybourne's son was Prometheus reminding Oliver that his actions have reverberating consequences.

Prometheus is Konstantin Kovar.
Enormous, skilled fighter, knows some of the moves Oliver learned in Russia, he fits all the criteria but one — he's too old to be the thirty-something bastard child of one of the Hood's victims. Unless...
  • Jossed. He is Adrian Chase.

Prometheus is The Muscle working for Susan Williams.
Susan is the illegitimate daughter of Justin Claybourne. She traveled to Russia to learn more about Oliver, and there she recruited Kovar to be the face (well, the mask) of the revenge scheme.
  • Jossed. Prometheus is Adrian Chase. In the ending of Episode 15, he meets Susan (out of his disguise), and clearly intends to use her against Oliver in some way.

Prometheus is Adrian Chase.
There was something about the way he was trying to convince Oliver to put a shoot on sight order on Prometheus. Considering what happened when the Green Arrow tried to kill Prometheus later on...
  • Confirmed, as of "Fighting Fire With Fire."

Prometheus is Konstantin Kovar's son.
The flashbacks are currently based in Russia, and have Oliver trying to kill Kovar, whilst in the present day, Oliver is battling a hooded bowman called Prometheus with a personal vendetta against Oliver. Prometheus uses a bow and arrow, but also uses a throwing star to commit several murders in 'So It Begins'. Now, Konstantin Kovar is actually the father of a DC superhero, Leonid Kovar, also known as Red Star, who has strength, reflexes, durability, agility, all elements Prometheus has displayed.What if, Prometheus is Leonid Kovar, son of Konstantin Kovar, who is killed in the flashbacks by Oliver, and Konstantin Kovar gets killed by an arrow?It would explain Prometheus' personal vendetta, ties the flashbacks in, and also reinforces the arc of actions having repercussions, ala Slade in season 2. And the return of the List? What if Oliver used Leonid to get close to Kovar in later flashbacks, but accidentally revealed The List to Leonid in the process?
  • Jossed. He is Adrian Chase.

Prometheus isn't actually motivated by revenge against Oliver. His true purpose is to create a city of chaos.
While Prometheus claims to harbor a deep-seated grudge against Oliver/The Hood/The Green Arrow, this may in fact be a ruse—he does want to destroy Oliver, but the revenge motivation may turn out to be a lie; in fact, his antagonism towards Oliver may actually be closer to The Joker's obsession with Batman from The Dark Knight, further hammering home the similarities between this show and Batman. In other words, Prometheus's true goal for Star City is To Create a Playground for Evil, and he wants to prove to Star City that he can corrupt and utterly destroy both its nighttime guardian (Green Arrow) and its daytime guardian (Mayor Oliver Queen), to remove all hope from the populace. Everything Prometheus has done so far—including the completely bogus claim that Oliver is responsible for Prometheus' creation to begin with—is to drive Oliver to the point of madness.

Prometheus knows so much about Oliver because during Oliver's time in Russia, he was unknowingly implanted with a cybernetic camera in his eye
It's no secret that Prometheus has an extremely intimate knowledge of Oliver/The Hood/The Arrow/The Green Arrow, to the point where you have to wonder if Tobias Chuch telling Prometheus his identity was even necessary to begin with, or if Prometheus already knew it. How could Prometheus know so much as to arrange the police bodies in the Claybourne Pharmaceuticals building exactly the same way Oliver left the guards' bodies four years earlier? How does Prometheus know so much? Perhaps during the season 5 flashbacks, at some point Oliver is drugged and his eye is replaced with a cybernetic camera, something completely unbeknownst to Oliver until this very day. From that point on, Prometheus—whoever he is—could see everything that Oliver has been doing, and now finally five years later is plotting to take him down.

"Prometheus" is a Meaningful Name
Essentially, when we ultimately find out everything about the character, we will be able to see direct parallels to the inspiration for his name from Classical Mythology. Thus, we may even use those parallels right now to speculate on his backstory, true personality, and who he actually is.

Prometheus is actually Amanda Westfield
It's not her son wearing the suit: she's the one out for revenge, and this would make sense of Prometheus suddenly knowing that Oliver paid a visit to question her about her son's whereabouts.
  • Jossed. He is Adrian Chase.

There is a connection between Prometheus and the Pandora data cache that Felicity retrieves

As of writing this, "Fighting Fire With Fire" has just aired, and Prometheus' identity is revealed as Adrian Chase. The promo for the following episode suggests that Oliver learns it soon as well, from Talia Al-Ghul in the present day. Still, there are plenty of unanswered questions, one of them being the name "Prometheus", which Adrian clearly took from Classical Mythology. In Greek Mythology, the character of Prometheus was heavily intertwined with that of another mythological figure: Pandora. In season 5 of Arrow, we know that the data cache that Felicity retrieves is called Pandora, presumably a reference to Pandora's Box. Still, this connection is unlikely a coincidence...well, perhaps In-Universe it really is a coincidence (or perhaps not), but to a viewer at least, there is likely a deeper meaning to this connection.

Prometheus is NOT Adrian Chase

The reveal during "Fighting Fire With Fire" is a fake-out by the producers. Prometheus is somehow controlling the person in question much as it was suggested earlier in the season that s/he was controlling Quentin Lance. This would also explain the rather Narmish acting later in the episode; he is still under Prometheus' control.

  • Jossed.

     What will be Prometheus' endgame? 
As of writing this, Prometheus has been unmasked as Adrian Chase. But whatever, that's almost beside the point. My question is...based on past seasons of Arrow (hell, based on past seasons of all Arrowverse shows), we know that the season finales tend to involve grandiose plans by the villains that the heroes must thwart. The pacing behind revealing these plans to both the viewers and the characters and how it fits into the characterization of the villain over the course of the whole season isn't always handled very well (e.g. Zoom's final plan in The Flash season 2, or Vandal Savage's final plan in Legends of Tomorrow season 1), but hopefully that won't be the case here. Let's look at the final plans of previous Arrow big bads:

  • Season 1: Destroy a portion of Star(ling) City and everyone living in it with an earthquake machine.
  • Season 2: Have an army of superpowered criminals cause widespread death and destruction to Star(ling) City, giving it a slow and painful death.
  • Season 3: Destroy Star(ling) City with a virus.
  • Season 4: Nuke the world.

We know Prometheus wants to torment Oliver as much as possible through physical and psychological actions, as he has done time and time again over the course of the season. But in the vein of standard superhero drama, this will eventually have to lead into some grandiose, horrific plan that puts a shit ton of lives at stake. The question is...what?

Any guesses, anyone?

  • Prometheus wants Oliver to be dead and despised by the public in death. This will involve killing a large amount of people alongside the Green Arrow, pin it on him, and then expose Oliver's identity afterwards, when he couldn't change his image in death.

  • Jossed. It really does amount to wanting to kill everyone Oliver cares about. The Serial Escalation is traded out for something more personal to the cast.

     Vigilante Theories 
As off Episode 1x15 ("Fighting Fire with Fire"), it has been established that Adrian Chase is NOT Vigilante. In light of that, anything and everything relating to Vigilante is up for grabs.

NOTE (as of March 4th, 2017): Marc Guggenheim has said that while the writers know Vigilante's identity, the audience will not find out until season six. So factor that into your guess.

UPDATE: On March 26, 2017, Marc Guggenheim indicated that Vigilante is indeed someone the audiences already know, thus completely averting the Stranger Behind the Mask trope.

Vigilante is connected to Wild Dog
It's entirely possible that Vigilante is ex-military (his fighting technique and MO certainly seem closer to Special Forces than say, League of Assassins). And while Rene's backstory has been explored to an extent, his time in the military really hasn't been expanded upon much. Maybe Vigilante is a fellow soldier of Rene's who like him got fed up of Star City's crime and corruption and literally took to arms (and ski-goggles). Hell, maybe he's related to Rene's deceased wife and was motivated by the same incident. It'll be even more interesting if Rene suspected this, and didn't share it with the team.

Vigilante is Captain Pike
I can't remember where I heard this theory, but of all the major recurring characters we've seen so far, there aren't that many who could even remotely conceivably share Vigilante's incredibly deranged ideology. A police captain, on the other hand, has at least some amount of sense to it, especially given that Vigilante hates crime but distrusts the court system...makes sense, I would suppose.

Vigilante is Justin Claybourne's son
I proposed this theory above, but I'll repeat it here. Following the revelation in "Fighting Fire With Fire", there are now three possibilities:
  • Adrian Chase is Justin Claybourne's son and wants revenge for his father's death.
  • Justin Claybourne's son is a Red Herring altogether, which means Adrian is motivated by something else entirely.
  • And one I suspect: Vigilante is, in fact, Justin Claybourne's son. Perhaps he knew of his father's corruption and regrets not doing anything to put a stop to it...he was then actually inspired when The Hood murdered his father, because he realized that he too needed to stand up to all forms of crime in the most brutal way possible, and he feels that he's doing this to essentially make amends for what he failed to do when his father was still alive and being a horrible criminal. I know I'm tooting my own horn here, but I feel like there's a certain elegance to this theory, so keep paying attention. What's particularly interesting is that even Adrian/Prometheus will continue to pretend that he's Justin Claybourne's son and thus motivated by vengeance. When Team Arrow finds out that Justin's son is in fact Vigilante, they'll realize Adrian is motivated by something else entirely.

Vigilante is one of the other major characters who have worn the mantle in the DCU
  • Greg Saunders
  • Pat Trayce
  • Justin Powell
  • Dorian maybe less likely since he's canonically Adrian's brother

Take your pick.

  • (not OP) #4 may not be so far-fetched, as IGN explains here. (Spoiler warnings for The Prestige, by the way.) Arrow could pull a twin plot twist (and thus partially untwist the Not His Sled nature of Adrian not being Vigilante, even if Adrian/Prometheus isn't Justin Claybourne's biological son.

Vigilante is the child of a minor character who was killed off earlier in the series.
  • The child of Lucas Hilton, Quentin's dead partner.
  • The child of Frank Chen, the member of Tempest who Malcolm killed.

Vigilante is the real Adrian Chase
  • Since "Adrian Chase" is revealed to be both Prometheus, as well as an assumed name, it could come as a double-twist if Vigilante turns out to be the real one, not dissimilar to "Jay Garrick" and Hunter Zolomon in The Flash.

Vigilante is The Huntress/Helena Bertinelli
  • I don't think this would be a huge stretch. In her appearances in the first two seasons of the show, she proves herself to essentially be a brutal vigilante willing to avenge her fiancée at any cost, and thus she primarily targeted other criminals, albeit in horrific ways. In a way, this isn't too far from what Vigilante already does. There's also something vaguely Jason Todd/Red Hood-esque about Vigilante, and it's possible that these similarities are deliberate by the writers. While Oliver never had an apprentice of his seemingly die on him the way Jason Todd did with Batman, Helena was still technically an apprentice of his for a very short period, so it's kinda close enough, I guess.

Since Prometheus is an expy of the Arkham Knight, Vigilante is an expy of Red Hood, as two separate incarnations of Jason Todd

  • Arrow has never shied away from its similarities to Batman and not only the characters it borrows from the Batman mythos, but many similar themes as well. In the main DCU, Jason Todd was a Robin, apprenticed under Batman, who was murdered by The Joker and later resurrected as a brutal, vengeful anti-hero, not unlike Vigilante. In Batman: Arkham Knight, Jason Todd is the Arkham Knight. In Arrow, we are initially led to believe that Adrian and Vigilante are one and the same, until Vigilante turns out to be a Decomposite Character and Prometheus thus a Composite Character of Adrian Chase and the comic book incarnation of Prometheus. So we can say that these two villains, Vigilante and Prometheus, are thematically tied. Prometheus has long been compared to the Arkham Knight, a villain that wears a dark mirror of the protagonist's costume and intends to make the protagonist suffer. Thus, the other villain in this scenario, Vigilante, represents the other side of Jason Todd's main non-Robin incarnation, that of the Red Hood.

Though I'm not speculating on Vigilante's identity here. Oliver has never had an apprentice seemingly die on him the way Jason Todd did with Batman in the comics.

Vigilante is someone who the audiences know, but who has never personally met Oliver Queen in his civilian persona (and is unaware of his dual identity)

  • In "Fighting Fire With Fire" he states his desire to assassinate Mayor Queen due to associating him with corruption. If this was someone that Oliver Queen had a personal tie to—say, Helena Bertinelli—then you think we would somehow notice that in the way Vigilante behaves, possibly being remorseful at having to kill his (her?) former friend. But it seemed like that in this case, Mayor Queen was a total stranger to Vigilante. So I'm trying to think of who else it could be:
    • Ted Grant? (I can't remember if he learned Oliver's secret or not)
    • Sin? (Again, I can't remember)
    • Alternatively, Vigilante is indeed someone who's met Oliver before in his civilian personality, but now has amnesia, is being brainwashed, or has a Jekyll & Hyde personality, which explains why he appears to not personally know Oliver when getting ready to assassinate him.

Vigilante is Vincent Sobel, Dinah's former partner and lover who was supposedly killed by Sonus
  • Essentially, we saw Sobel supposedly die when Sonus shot him in the head. No One Could Survive That!, right? Except, this was right when the S.T.A.R. Labs particle accelerator explosion went off in Central City. He may have become a metahuman just as he was being shot in the head, and whatever powers it granted him may have allowed him to survive, which would mean that, yes, Vigilante is a metahuman. Again, this all ties back to Stephen Amell's comment in early September 2017 that Vigilante has connections to a member of Team Arrow. I feel like this would tie in well with Vigilante's worldview of life, with this Judge, Jury, and Executioner being a former cop who effectively stared death right in the face, which just utterly broke the man entirely. Also keep in mind that in Dinah's first appearance she too was a cop who had been completely broken and decided to take the law into her own hands, so it would be quite fitting. note 
    • Confirmed.

     Season 5 Finale Theories 
One episode to go, one episode for wild speculation left.

Black Siren will betray Prometheus
In the clash between Oliver's team (Team Arrow + Malcolm, Nyssa, Slade and Digger) and Chase's team (Evelyn, E2 Laurel, Talia), Black Siren will ultimately betray Prometheus - either because Prometheus is about to kill Lance (her father's doppelganger who, going by 5x22, she might possibly have some attachment to) or Oliver (the doppelganger of the man she loved and lost). This will tip the scales in favor of Team Arrow and also begin Black Siren's redemption arc that will continue into Season 6.
  • Prometheus may have her killed for her betrayal, most likely anticipating that she would.
  • Jossed.

Chase will commit suicide
By the end of the episode, Chase will be broken down psychologically to the extent that he realizes that he has no reason to live after his mission to destroy Oliver's life fails, and so he will kill himself.
  • Well he does commit suicide, but it's to activate his Death Switch.

Vigilante will show up unexpectedly to help Team Arrow.
And then tells Arrow when all this is over, they're still going to have something to settle.
  • Jossed.

     Season Six and Beyond 
Sure, there's still a couple of months to go before Season 5 ends, but since we know Arrow is coming back for Season 6 at the very least, and will possibly stay longer, it doesn't hurt to start some advance speculation on the next season.

The 'Outsiders War' story will be adapted for Season 6
Since Season 5 will most likely complete the five-year story of Oliver saving Star(ling) City, it would be the right time to adapt this Jeff Lemire story, which expands the scope of the Green Arrow mythos beyond Oliver's vigilantism. Consequently-
  • Katana will return, as a representative of the Sword Clan.
  • Malcolm Merlyn might figure into the plot, taking the place of Simon Lacroix from the original story (who was an Expy for Malcolm anyway).
  • Instead of Robert Queen being the one trying to find the mystical 'green arrow' artifact, it will be Yao Fei. We'll learn more about Yao Fei's backstory through flashbacks, including how and why he came to don the green hood and his training under Talia.
  • Nyssa and/or Talia will figure into the plot as well - as prospective seekers of the 'green arrow' perhaps (Talia more so if it turns out she was helping Yao Fei and her motivation to train Oliver was to make him a worthy enough successor to the Yao Fei as a wielder of the green arrow).
  • Mei, Shado's twin and Yao Fei's daughter, might also return.

Future flashbacks
Given that the 5 year flashback narrative of Oliver's origins will no longer be around-
  • There will be flashbacks of Laurel Lance's time as Black Canary, which will tie into a present-day storyline of Dinah trying to live up to Laurel's legacy and/or following up on an old case of Laurel's.
  • Flashbacks to Malcolm Merlyn's time with the League of Assassins.
  • If Roy returns, then flashbacks to what he's been up to since Season 3, especially if its relevant to a present-day storyline (for instance, perhaps his meeting Cheshire).
  • Flashbacks to hiatuses. For instance, the hiatus between Season 2 and Season 3 (when Oliver and Roy were both active), Season 3 and Season 4 (Diggle, Thea and Laurel - a period in which solo Laurel-as-Black Canary adventures could be squeezed in), Season 4 and 5 (Oliver's solo crusade as Green Arrow while being mayor) and of course Season 5 and 6 (depending on how Season 5 ends).
  • Flashbacks to previous seasons.
  • Flashbacks to the flashback arcs of previous seasons (for instance, an episode's flashbacks set during Oliver's time in Hong Kong, or Russia).
  • Flashbacks to Diggle's pre-military life.
  • Flashbacks to Rene's time in the military, which was initially teased in the previews for "Spectre Of The Gun" but never came to fruition.

Oliver will be public as Green Arrow in season six.
  • The showrunners have discussed how season six will be a major change from everything done so far in the show, almost a soft reboot (except still in continuity), and this would certainly change the status quo.

Kovar will be the Big Bad, or at least the Disc-One Final Boss.
  • Jossed, he died in the Season 5 finale
Anatoly will be the Big Bad
Disbanded was the perfect set up. Their We Used to Be Friends dynamic would make for great drama.

Malcolm will kill Detective Lance
  • Malcolm orchestrated Sara's death and he wasn't punished for it. He played a role in Laurel's death and he wasn't punished for that either. He altered all of time and space with the spear and killed all of the heroes and he still wasn't punished. Seeing as how the heroes are never going to punish him for his crimes, there's no reason for him not to do so just to hurt Oliver.
    • I think the real headline you're trying to make is that he will remain a Karma Houdini. Sadly, I think that is almost a given. For some very disturbing reasons, both the network and some fans are still very enamoured with this guy.
      • Not as enamored as you think, Barrowman isn't appearing again in Season 6, so he won't be seen being punished, but he won't be getting away with any new shit for a while.
    • Preemptively Jossed. John Barrowman has stated he isn't reappearing in Season 6 or in Season 3 of Legends of Tomorrow. He can't kill someone if he isn't there to do it.
    • Completely Jossed. He performs a Heroic Sacrifice in the Season 5 finale and, even before then, showed no desire to torment Oliver. And since Barrowman isn't coming back next season he'll be staying that way for a while.

Cayden James and Helix are Season 6's Big Bad or Recurring Bad
The rumour is wild on the web, Vigilante is not the only mystery that will take multiple seasons to solve.
  • Confirmed, at least for Cayden James.

Relating to the above theory with Helix and Cayden James, the season 6 antagonist will not necessarily be evil, causing the viewers to carefully think about whether they or Team Arrow truly has the moral high ground
The producers have said before that they like mixing things up, particularly in terms of the Big Bad Ollie has to face. In typical comic book fashion, each one of the big bads that Team Arrow has been an outright villain; sure, they may have some Freudian Excuse or some ostensibly nobler goal (at least in their own minds) or people close to them who they truly love, but there's no doubt about which side of the moral line they lie; hence, Team Arrow's opposition to them is completely justified. But what if that were no longer the case? Prometheus is arguably Arrow's darkest villain yet, but after seeing the episode "Dangerous Liaisons", I can't help but wonder if the show will move in the opposite direction in season six. What I enjoyed about that episode is that the main conflict boiled down to ARGUS vs. Helix, and both are represented as various shades of grey—not quite evil and not quite good, but somewhere in-between. You could even argue it's Order Versus Chaos, with ARGUS representing order and Helix representing chaos. So perhaps Helix could indeed be the main antagonists of season six, but what will make the conflict so enjoyable is that the viewers themselves will never really be sure who to root for from episode to episode; it could be Team Arrow, but it could be Helix themselves (or whatever other morally grey antagonist they face). Various members of Team Arrow may have differing views; even Felicity, who sided with them in season five, may no longer agree with them, but other members of Team Arrow possibly could. I think this could be a bold and very challenging new step for the writers, but after five seasons of experience they'll hopefully be up for it. This also doesn't necessarily affect the tone of the show itself; while the antagonist themselves may be "lighter" than Prometheus, the show could be lighter, darker, or the same. Sometimes incredibly dark conflicts can occur when two morally grey sides oppose each other (e.g. Captain America: Civil War).

Everyone DID survive the explosion.
They all got away before the explosion.
  • Jossed.

Vigilante will continue to antagonize Oliver.
  • If Evelyn survives and refuses to redeem herself despite Adrian's suicide, she will join Vigilante. Only if it means Vigilante will kill Oliver.

If everyone survives, Oliver and Felicity will get back together.
After a little talk with Samantha, Felicity forgives Oliver for not telling her about William.

If everyone survives, Oliver will tell him every other secret he's kept.
After everyone reunited, we then jump to a few months and resume their crimefighting activities. During that Time Skip, Oliver tells him everything else he's hidden. So when something else from Oliver's past comes back to haunt him, Team Arrow is already well-informed. Showing that the team completely trust each other.

If everyone survives, Rene will gain back custody of Zoe.

If everyone survives, Curtis will get a new boyfriend.

Most of the characters survived, but were separated and don't know who lived or died themselves.
My idea is that Deathstroke, Felicity, Curtis, Dinah and Samantha escaped off Lian Yu before the bombs went off while Thea, Diggle, and Rene go to help Oliver, which is how they get Samantha to agree to go. Merlyn and Boomerang are really dead and Evelyn dies from the bombs. Black Siren survives in a series of secret catacombs under the island. Having spotted her Thea, Diggle, and Rene follow her and get closed off inside the catacombs. Oliver and William are found by those who got off Lian Yu before going to search for survivors.

The team will have to work with Adrian's former allies to survive.
Black Siren, Evelyn, & Talia working with Team Arrow. Sounds like a recipe for fun.
  • If there's a situation where they decide to split up, Evelyn will be stuck with her ex-teammates Renee and Curtis. They'll spend most of the time trading insults. Then Renee and Curtis will call her out for choosing Adrian, who's killed innocent people just to "punish" Oliver. She suddenly raised her voice telling them it was Oliver's fault that her parents died. She asks why they chose to remain on his team when he turned out have been a killer. They tell her Oliver has learned from his mistakes and has helped them become better. They struck a nerve tell her that her parents would be ashamed of her siding with a cold-blooded killer.
  • Quentin will go with Black Siren, who's petty about him knocking her out. Quentin reminds her that Adrian left her to die, she has nothing to say to that.
  • Which would leave Talia with Nyssa. The two will continue their Sibling Rivalry, and Talia still intends to kill Team Arrow for the death of her father. Talia will tell Nyssa that she should have killed her when she had the chance.

Until proven, everyone on Lian Yu will believe Oliver DID kill Chase.

All of the current Team Arrow ARE really dead, and Oliver will now build up a new Team Arrowthat matches more with the comics.
  • Oliver continues go as Green Arrow, but decides to retire from being Mayor out of grief while appointing a new successor and to take care of William, but eventually decodes to take back his company. While doing so, he meets up with Naomi Singh, Henry Fryff, and Jax Jackson, all workers in his company who he recruits like in the New 52. He takes back his company, and also starts to train William so he becomes the Arrow equivalent to Connor Hawke (How this conflicts with "Star City 2046" can be explained later), while Roy comes back in order to honor Thea, and goes back to being Arsenal. Also, maybe ressurect Laurel, but more on that as Season 6 goes on.
Joe Wilson will appear.
At the start of "Lian Yu", Oliver gave Slade a flashdrive containing all the intel he could about his son, including his whereabouts.

Samantha Clayton died in the explosions on Lian Yu.
The previews have been mentioning that Oliver will have to take up the role of fatherhood in season 6...this, combined with the Comic-Con trailer whereby we see Samantha running off as the bombs detonate, followed by this exchange between a suitnote -wearing Oliver talking to a distraught William:
Oliver: It was just a dream.
William: It's's what happened.

Finally, we don't see Samantha anywhere in the previews other than that one scene as the bombs go off. While at this point, based on previews and other things, I suspect the vast majority of people on the island survived, I strongly suspect that Samantha died, meaning it's now up to Oliver to raise his son.

  • Confirmed.

Michael Emerson will be playing Cayden James
  • I'm hardly the first person to have this theory. We know that Michael Emerson will play a mystery villain in season 6, but we don't know who yet. A common guess is that it's Cayden James. While I think most people did not expect Mr. James to be a 63 year-old man given the relative younger age of other Helix members, it seems to make sense.
    • Confirmed in "Reversal".

The flashbacks for this season will show how Team Arrow survived the explosion and got off the island
The show will open in the future when some, but not all, of those left on the island have returned to the fold after a period where Oliver and William believed they were dead. Exactly what went down on the island, how the survivors got back to Star City, and who died, will be slowly revealed throughout the season.

William and Zoe will be a Toy Ship
For the cuteness factor.

Huntress's reappearance as a special guest star will set her up to be a major character for season 4 of Legends of Tomorrow.

Vigilante is Tommy Merlyn.
Given the tendency for characters not to remain dead for long, it's possible that Tommy may have fallen victim to Came Back Wrong. Also, Marc Guggenheim said that the person beneath the mask will be a familiar face. Additionally, it'd be a heck of a gut punch to Oliver and serve as as a reversal to their positions in season one.
  • Jossed.

Oliver will eventually decide to train his son to be a fully fledged member of Team Arrow
Yes, this sounds ridiculous, and that's why virtually every other character will be firmly against it. This won't happen all of a sudden, of course. Likely what will happen is that William gets abducted yet again, and when Oliver finally gets him back, he realizes this will continue to happen for the rest of their lives given that William is the son of such a prominent character (both publicly as the mayor and in private as the Green Arrow). Thus, the only thing to do is to teach William to defend himself to prevent it from happening again. Alternatively, another possible scenario that spurs this on is that every member of Team Arrow (including Oliver himself) gets abducted and held hostage, and somehow little William is able to rescue them, obviously not prevailing in direct combat with the captors but rather beating them by using subterfuge and Home Alone-style tactics. Oliver then realizes that William is more than capable of taking care of himself, and thus decides to train him further. Again, this will create a major source conflict among the team, which the writers seem to love.

Black Siren will be given a lot more Kick the Dog moments, often involving complete innocents
The writers don't live in a void, so they're probably becoming aware that Black Siren is a total Draco in Leather Pants with a huge portion of the fanbase gleefully cheering on her efforts to torment the good guys. Their solution to this? Quickly make sure she reaches a Moral Event Horizon reaction with audiences by having her do lots of horrible things For the Evulz, like kidnapping William and/or Zoe and torturing them, murder a friendly charity worker just for being in the wrong place at the wrong time, drown a cute animal while laughing about it, and have her push a depressed teenager to commit suicide. And if the fans still hate Dinah more than her after all of that? Find a new way to keep Katie Cassidy in the show, but kill Siren off.

Following the events of "Tribute", William will be the one to convince his father to continue being the Green Arrow
At the end of the episode, Oliver realizes he cannot be the Green Arrow, the mayor, and a father to William, so he passes on his mantle to Diggle. My guess is that William will ultimately be the one who convinces him he needs to return to the field, somehow, and may even force his father's hand to do so. Otherwise, I can't really see any reason why Oliver would return to the field.

The startup that Felicity and Curtis found will be called Smoak Technologies
We saw this company in the episode of Legends of Tomorrow "Star City 2046", as well as in the Dominators' dream world from Invasion. Presumably it will exist at some point in the future, so why not start now? Hell, they may even get the idea from Oliver or Diggle mentioning what they saw in the dream world, or even from Sara during the upcoming "Crisis on Earth-X" crossover. Alternatively, and less likely, they could call it "Queen Inc." since presumably that company will also exist at some point in the future (where it may merge with Wayne Tech), but since Oliver or anyone from the Queen family really has nothing to do with the company, that seems less likely.
  • Jossed.

There will be an episode focused on flashbacks centred around Black Siren, including showing how she was recruited by Zoom
Yes, that's right, presuming that Teddy Sears is available, there will be flashbacks to focus on her and show her Start of Darkness, including how she was initially recruited by Zoom before it all got even worse from there.

Alena is a mole for Cayden James
At the end of the episode "Reversal", it appeared that Team Arrow had thwarted Cayden's plans to destroy the whole internet, but it turns out that it played right into Cayden's hands—he just wanted Felicity to take down the firewall protecting the vault, and to get her digital fingerprints on the processor. Perhaps Alena was in on the whole thing, and thus her actions in the episode were to goad Felicity into doing this?

Samanda Watson isn't just an Inspector Javert, but is actually Evil All Along
This never really occurred to me until after the episode "Thanksgiving". Based on Oliver's prodding, it is implied that her motivation isn't simply the fact that she's just an FBI agent doing her job, but actually has some hidden personal baggage that ties into her dislike of vigilantes. But maybe this isn't the case...maybe, in fact, she's working with another villain, like Cayden James or Richard Dragon? Her job as an FBI agent is genuine, but she may be a "friend on the force" for another villain, or at the very least they were able to accurately deduce which FBI agent could be bribed into doing their dirty work for them.

Crisis on Planet-X
Since Oliver-X's body is all that remains as evidence, Team Oliver will blame the crimes committed by "The Green Arrow" on him and Oliver will be cleared of all charges.
  • Unless Samanda Watson is too smart to fall for that, pointing out the conveniency of it. While she can't explain how the body resembles Oliver, she's still suspects the main Oliver is the Arrow.

Cayden James' son was Cooper Seldon
Who better to be the father of a hacktivist than a hacktivist?
  • His death may have contributed to his descent to villainy.

Renee, Dinah and Curtis will become The Outsiders

Cayden James' son was Prometheus
I know this seems ridiculous on so many levels. I mean, Adrian Chase's father was Justin Claybourne, was he not? And the whole point of his crusade was to avenge his father? And why would Cayden James give Felicity the technology to track his own son, only to later seek revenge? And yet, somehow, I can't shake the feeling there might be a groan-worthy soap opera twist in which it turns out this is somehow the case, as crazy as it sounds. According to Word of God, the inevitable reveal will be shocking and controversial, so the very popular (yet somewhat bland) theory that he's the father of Brother Eye may not come to pass:
Marc Guggenheim: "We've got some very, I think, unexpected things coming up with Michael's character. But I think the key to any villain is their motivation. I think you'll start to see, in the early episodes once we come back from the break, a little bit more about what Cayden James is motivated by. You learned a bit about his son. There's more to that story. There's actually a lot more to that story. I think it's going to unfold in a way that will really surprise people. I actually expect it to be controversial because we're doing something that's so different than what we've done in years past. There's one particular hard right turn that we've got up our sleeves that we've never done before. So I'll be curious to see what people think of it."

Cayden James' son is Roy Harper
  • This is another common theory, similar to Brother Eye. Roy never knew his parents. Now, as far as the public knows, Roy is dead after taking the fall as The Arrow, and Cayden knows that Oliver—The Green Arrow—is connected to that, and thus seeks revenge. We already know that Colton Haynes will be reprising his role as Roy later on this season.

It was Ricardo Diaz/Richard Dragon who killed Cayden's son and framed Oliver, and leaked the photo of him to the media
  • At the end of "All For Nothing", the team speculates that the real villain is someone who is close to Cayden James. Who is currently close to him? Well, it can't be Anatoly, as Owen's son was killed when Oliver was still more or less on good'ish terms with him. Of course it isn't Black Siren, who was working for Prometheus at the time. This only leaves the X-factor, the one who was advertised before the season began to be the Big Bad, and the one we know the least about: Richard Dragon.
  • Confirmed!

Alternatively, it was Alena
  • She knows Cayden James well, she has computer skills necessary to modify the images, she knows true identities of Team Arrow, and when you think about it, wasn't it her who started the whole plan to get Cayden James out?

Related: Cayden James actually has NO allies at all
  • He's been played from the beginning to think he's the big boss, but no one is actually loyal to him. He's a fall guy who will be very surprised when his usefulness suddenly ends.

Vigilante isn't dead
Just like last time, we never found out what happened to his body after his supposed "death". Maybe his Healing Factor will once again turn out to have saved him.

Alternatively, it was Alena.

Sara will use on the recently discovered Lazarus Pits to bring Laurel back to life.
Sara's coming back for the finale, and she knows that while using time travel to bring back loved ones won't work, the Lazarus Pit makes for a nice Loop Hole abuse.

Dinah Drake will be killed off by the end of this season
Sara, and Laurel were both killed off in their second season of being the Canary. So it's tradition at this point.

Ricardo Diaz will kill Felicity or William
At this point, the recruits have split off to form the Outsiders, Roy and Thea have left to destroy the extra Lazarus Pits, and Diggle has joined ARGUS for real. All that's left for Diaz to do is kill Felicity, William, or both.

The big "game-changer" at the end of the season six finale
Both Stephen Amell and Marc Guggenheim have said that the season six finale contains a major, game-changing event, even bigger than the season five finale; and that unlike the season five finale, they won't renege on what they do. listed three possibilities for what this might be:

  • A character's death.
    • I'm thinking this one might not be too likely. Major characters dying has always been a significant part of the series, but the most recent times it happened—to Sara and then Laurel—were met with negative response from fans (it didn't help that the respective seasons where these happened overall suffered from poor writing and are often considered to be among the weaker chapters in Arrow's history). I'm guessing this negative feedback is also probably why they didn't kill off any major member of the main cast in the season five finale, I would think. Besides, this trope has gotten really tiresome in the series, and fans know this.

  • Oliver loses his arm, as seen in Star City 2046.
    • Again, I would call this one unlikely. In that episode, Grant Wilson explicitly says that he was the one who took Oliver's arm. It's unknown how old Grant Wilson is in 2046 or in 2018 for that matter (think of when Slade would have even had the opportunity to conceive him), so where he fits into the timeline is anyone's guess. However, the fact that Sara pops up in the season finale does lend some credence to the idea that these kinds of time-travelling shenanigans might be involved somehow. Which also ties into the last theory.

  • Oliver publicly outs himself as the Green Arrow.
    • This is considered the most likely outcome. The problem is that, once again, this is something that Grant Wilson was said to ultimately do to Oliver, meaning it has yet to happen—but again, Sara's presence in the episode might be related to that. All in all, it's entirely possible the future of Star City 2046 has already changed for some reason (probably not Flashpoint, as that actually caused John Diggle Jr. to exist in the first place, who is a necessary component of the Star City 2046 scenario). In any case, assuming Oliver being publicly outed is what happens, it would open up a whole new storyline for the show to explore, and that would be genuinely exciting, because people would have no idea where the show could go from there. This also potentially explains how Roy Harper could return in season 7. If Oliver confesses that hs'e not only the Green Arrow but was also The Hood and The Arrow and that Roy Harper faked both the mantle and his death, then Roy can come back in the spotlight (albeit now as a wanted vigilante, much like Oliver). This doesn't explain how he breaks off from his quest with Thea and Nyssa, but at least it sorta explains how he could theoretically publicly show his face in Star City again.

  • UPDATED: Oliver goes to jail!
    • This wasn't one of the predictions mentioned in the link above, but the season six finale's title has been revealed as "Life Sentence", the obvious implication to viewers being that Oliver goes to jail for being the Green Arrow. This one might be tricky to pull off, given that Word of God says that the shockwaves from the finale will not be undone this time—this means that, unlike The Flash, Oliver would stay in jail for an extended period of time. And that wouldn't really make for a very interesting show or an interesting crossover for that matter, now would it?

     Season 7 theories 

Black Siren will die
The show will have to move on from her at some point.
  • If so, she'll presumably be killed by Diaz as revenge for her betrayal.

The Suicide Squad will spirit
A team of minor villains will be assembled and be forced to save the day during a crisis, but their superior will be a new government figure, like King Faraday, and they won't even be a new Task Force X, but Task Force Y.
  • Confirmed although they're going by a new name.

William will become a vigilante
He'll call himself Bowman.
  • Possible confirmed. The end of the premiere strongly implies that the new Green Arrow is a future version of William.
    • I wouldn't say it's "strongly implied", given that Beth Schwartz has said that this season will feature very few Speculative Fiction elements other than what's already there at the beginning (e.g. Black Siren being a metahuman and Earth-2 doppleganger), so Time Travel seems quite unlikely.

The mysterious vigilante in the trailer is Roy
It will be the showrunners way to re-introduce him into the main cast.
  • Jossed

This season will be the show's last
With Kate Kane's imminent arrival and the show she will headline being on the way, the CW might need to cut something. Arrow would be the best bet due to it being so much longer than the other shows in the line.

Stanley is actually Stanley Dover
The season premiere introduces a man in prison who wants to be the friend and protectee of Oliver, and claiming he was wrongly convicted. His name is Stanley. The name "Stanley" actually has some relevance within Green Arrow lore; specifically, the 2001 Kevin Smith arc "Quiver", a follow-up of sorts to Stanley and His Monster. If true, it'll be interesting to see how this plays out.
  • In "The Demon" we briefly see an elderly man speak to Stanley during visitor's hours. Perhaps this seemingly unimportant guy is Stanley Dover Sr.?
  • Stanley is indeed Stanley Dover, as confirmed in "The Slabside Redemption". Though this now begs the question of how a more "grounded season", as Beth Schwartz described it, can faithfully adapt an inherently mystical character.

The Corrupt Cops defect to Diaz and the Department is replaced by new cops.

Agent Watson will be revealed to have been working for Diaz and Evil All Along.
Seems pretty obvious. She spent the entire previous season sitting on her hands regarding Diaz and Cayden's horrific crimes, only pursued Team Arrow and only bothered putting forth a tiny bit of effort in supposedly trying to capture Diaz after Oliver agreed to be sent to prison which, of course, would be great for Diaz's evil plans. THEN, after Diaz was knocked off a roof by Black Siren, Watson conveniently jumped at the excuse to call off the search and arrest Oliver and publicly outed his identity. Combine this with her jerkassery and condescension to everybody through the previous season and you've got yourself an Obviously Evil henchwoman.
  • Jossed as of the third episode.

Stanley will be the Big Bad
As of the second episode, I'm far more convinced this will actually be the case. They've introduced the Longbow Hunters very early, and Diaz is still out there, and I don't think anyone is expecting these four characters to actually carry the whole season. It would be more interesting to introduce a character who appears to be an ally, more-or-less, and one that is essentially beneath suspicion, and then have him turn out to be the true evil. I'm very suspicious of this guy, now—while generally a meek man who apparently wants to make "friends" with Oliver, he actually comes across as more of a Dirty Coward, encouraging Oliver to give into his darker and more violent instincts despite himself not being able to back up any of that power play. There's definitely something off about him, and I think he's more than meets the eye. Going to my above theory, I think he's also Stanley Dover.

Diaz will die relatively early in the season
The potential of his character seems to mostly exploited already, so it's more or less logical that they will want to go with something new eventually. To make room for a new, even more threatening big bad. He will propably be killed by Longbow Hunters, so they could operate on their own and have Star City for themselves and/or new main villain.

The New Green Arrow is Emiko Queen
The upcoming tenth episode, presumably the first one after the holiday break, was originally titled "My Name Is Emiko Queen" (before being changed to "Shattered Lives", possibly to try and cover up the potential spoiler). It's unknown how this version of Emiko relates to the Queen family, but it still seems like she'll be a character in some capacity, and most likely the true identity of this New Green Arrow. It's certainly helped by the fact that the final episode prior to the annual crossover event and thus effectively the real mid-season finale is titled "Unmasked".
  • Confirmed with a vengeance

The New Green Arrow has something to do with the Elseworlds crossover
I know this is hypocritical for me suggesting this when I've rejected the theories of Time Travel given Beth Schwartz's comments about this season being far more "grounded", but I also realize that the Arrowverse has in the past timed their crossovers quite well occasionally, where an individual series' narrative actually manages to be tightly woven into the crossover, such as dealing with the effects of Flashpoint during the Invasion crossover or the end of Firestorm during Crisis on Earth-X. Maybe now it's Arrow's turn to shine during the crossover. I still think the New Green Arrow is likely Emiko Queen (given my entry above), but the question remains: who exactly is Emiko Queen? In the comics she is the daughter of both Robert Queen and Shado, which obviously would be impossible to happen in Arrow, necessarily meaning her origin will be different. What if she's from a parallel Earth, like Black Siren's home of Earth-2, where we know Robert Queen is not only alive but is himself the Green Arrow? And while the series is looking to cull these Flash-esque elements of the series like parallel earths, the annual crossover—which seems to take place right around the episode of Arrow titled "Unmasked"—could allow the one "get-out-of-jail-free" card to those rules, effectively, since we already know it deals with parallel earths, much like the last crossover.

Stanley and his "monster"
It's now been established that his character is based on Stanley and His Monster, and he'll likely return during the season. In order to adapt Spot the monster, part of his backstory is creating an Imaginary Friend as a boy to cope with a having Abusive Parents (i.e. Stanley Sr.) and a Friendless Background. However, "Spot" kept telling him to do bad things which led to his imprisonment. As seen in 7x07, he tries to justify and excuse his actions. He may even blame "Spot" for killing Brick.
  • Adding to this, if the Flash Forward scenes will happen, then Stanley is the one who kills Felicity, as revenge for Oliver's "betrayal".
    • Jossed, but he was close.

Evelyn Sharp survived and is working for Diaz.

Felicity will be killed by...
Agent Watson:
  • As revenge for getting demoted to desk job in Washington DC. She intended to frame Oliver for the murder, in an attempt to return him back to the Slabside.

Stanley Dover:

  • As revenge for Oliver's "betrayal".

Ricardo Diaz:

  • Thanks to Diggle and Lyta using him to help track the Longbow Hunters, Diaz manage to escape and manage to kill him. Hopefully, Felicity takes him with her. While he doesn't get a chance to kill William and Oliver, knowing that Oliver will suffer will be good enough for him. This may have also contributed to the team's separation.

All jossed, as according to Blackstar (Felicity's daughter) in "Star City Slayer", Felicity faked her death (presumably). Although Stanley Dover nearly killed Felicity and was the reason William was sent away from Oliver and Felicity. Lastly, Oliver's deal with Agent Watson seems to serve as the catalyst for their family and the team's eventual falling out.

Stanley is actually a Decomposite Character
He'll take the roles of Stanley Dover, Sr. for a different child, to whom he may or may not be related and his actions will result in said person being set on the path to meet the demon Spot.
  • Considering Stanley murdered his own brother and apparently has no other siblings, this seems likely.

Stanley will be forced into the Ghost Initiative.

Instead of getting her own spin-off show like rumored, Blackstar will join the Legends

Dante isn't really dead
  • He was merely stabbed, not beheaded. In the end, there can be only one.

Kacey Rohl (Alena) will join the main cast in season 8
  • So I'm typing this just hours before the season 7 finale. Anyway, we know that Emily Bett Rickards (Felicity) will be leaving the series at the end of season 7. This would mean that for the final season there would be no go-to hacker for Team Arrow. Alena already has a fairly good relationship with the team as a recurring character over the course of three seasons, so it would make sense to promote her from recurring to main. Even from what we know of her in the future flashforwards, she's still more-or-less a heroic'ish character.
    • Completely Jossed. Three episodes in and she hasn't appeared or even been mentioned yet.

     Season 8 theories 
Barry and Oliver will die together in the Crisis
  • We know that, according to The Monitor, both Barry and Oliver are slated to die in the Crisis. My theory is that yes, they are absolutely serious about this, this will happen, and there will be no take-backsies or anything. However, it might still be a somewhat heartwarming moment, as these two great friends will be with each other in their last moments and sacrifice themselves at the same time, making for a somewhat platonic version of Together in Death (and given the mystical side of the Arrowverse via Constantine et all, we may even see them in the afterlife).
    • Jossed. Oliver fights nearly to the death defending Kara's Earth and then dies surrounded by friends and family. Flash on the other hand gets to abuse the wording of the prophesy. It says The Flash, it doesn't specify Barry Allen and the Flash of Earth 90 dies in his place, with no witnesses raising the question of how and where the story originally came from. Though Pariah and the Monitor both admit they didn't see this coming so time is fluid here. Which is somewhat constant in the Arrowverse.

There is another weapon, called "Charybdis"
To fit the whole "Odysseus" theme. We just haven't ever seen it.

The Monitor is manipulating Oliver into making a weapon capable of killing the Anti-Monitor
  • The Monitor has insistently kept Oliver locked out of the loop and has almost deliberately seemed to be pushing him in a couple of instances. Oliver goes rogue from him as of the end of "Welcome to Hong Kong", but he hasn't seemed to care for the most part. As of the end of "Present Tense", Oliver is convinced that the Monitor is responsible for the Crisis and is attempting to make a weapon capable of killing the Monitor. The Monitor has done absolutely nothing in response to any of Oliver's actions, but given that the Monitor has been more-or-less omnipotent up until now, it's safe to say that he could very well be aware of what Oliver is doing and is letting him do it because the weapon Oliver is making will be capable of killing the Anti-Monitor in the Crisis on Infinite Earths later this year. Mia, William and Connor being sent back to the present might also have something to do with this. Allowing Oliver to be the creator of the weapon that kills the Anti-Monitor in the Crisis on Infinite Earths and saves the multiverse would be a pretty nice way to end the former playboy billionaire's story arc and would explain why the Monitor has done absolutely nothing in response to Oliver defecting (since he had Lyla to deliver the good doctor anyway), despite him still pulling strings as he's implied to have been by sending William, Mia and Connor to 2019.