- Nope. It's just music Peter's mother loved.
- Jossed. Alas, no. He makes brief reference to his daughter, but so far as anyone knows she's still dead.
- Jossed. She's Mantis.
- You're close; it's Ayesha/Kismet, Adam Warlock's other villainous counterpart.
- Nope, and nope — although a post-credits scene does feature Adam Warlock's sarcophagus.
- Jossed; it's Ayesha. Also, Ulysses Klaue is a Black Panther character, and those rights have been at Marvel Studios for years. Annihilus's rights are tied to the Fantastic Four package, so he can't appear into the MCU until those rights revert.
- Jossed; Its not actually Ayesha who is the Big Bad, its Ego.
- Drax's flashback will show a few typical, mundane moments of his life on his home planet with his wife and daughter. It'll be really sweet and show how happy a time it was. Then Ronan's forces would show up and destroy their home and kill them.
- Gamora's would be similar to Drax's, only she would be the little, innocent daughter in the scene. Obviously. Then it will show none other than Thanos himself killing them and "adopting" Gamora, while possibly showing her getting her bionic parts from the get go.
- Rocket as a normal raccoon...well, to be more accurate an alien that looks exactly like a raccoon from Earth, like how the Xandarians look human. He'll be rummaging and stuff before he's captured and experimented upon by scientists who make him into what we know him as. It'll also be Nightmare Fuel, by showing the experiments from Rocket's perspective as he undergoes them.
- Groot will be part of a clan of family who all use the same Pokémon Speak tic as him. Then, he gets hidden by his elders before the others are slaughtered and burned down by the Kree, who are ones who killed Groot's kind in the comics.
- Nope. The only flashbacks we get are Ego and Meredith on Earth, before Peter was born, and a brief glimpse of Yondu teaching a young Peter how to shoot.
- Gamora does get one in Avengers: Infinity War, similar to the one you guessed, though.
- Nope. The only flashbacks we get are Ego and Meredith on Earth, before Peter was born, and a brief glimpse of Yondu teaching a young Peter how to shoot.
- Nope, just a robot brothel.
- Unfortunately not (too bad)
- Or perhaps meet previous "Guardians of the Galaxy" to learn that they were not the first ones to take the name. For an added bonus one of the members will be a much younger Yondu.
- The Time Stone part has been jossed, according to James Gunn, the Infinity Stones don't pertain to the plot.
- Explicitly jossed. Though the original Guardians do make a cameo appearance.
- Jossed because David Bowie's dead since January 2016 unless you brought in some CGI.
- "Space Oddity."
- Both Jossed.
- Jossed. Her outfit includes footwear.
- We are Groot.
- ''I'' am Groot.
- We need to have a talk about your language.
- Is no one going to comment that the Cap just said "language"?
- Jossed. He doesn't appear.
- ... Kind of? Thanos's role in Gamora and Nebula's past informs their behaviour.
- To add hilarity, Peter will be incredibly annoyed after all the trouble he went through to get someone to call him Star Lord.
- Jossed, although we do see a vast cave full of the bones of Quill's half-siblings.
- Sadly confirmed. Simon Williams was going to have one scene, and that was cut before production.
- The Goddess
- Another of Thanos' "children"
- The Matriarch
- All Jossed; she's playing Kismet.
- Jossed, Stallone is playing a Ravager.
- Could still happen, but Jossed on the Nova Corps, Stallone is a Ravager named Stakar.
- Confirmed. At one point, he yelled "You betrayed the code" not unlike "You betrayed the law".
- Dr Strange suddenly turns up and remarks he must have miscasted a teleportation spell and then leaves to the Guardians confusion.
- The Guardians watching have gone to earth and are in a cinema room watching one of the Simon Williams movies from the set pictures to everyone else is scared of the appearence of the aliens or do not care.
- The continuing adventures of Howard the Duck as he walks out on a Simon Williams movie.
- Since there's usually one tied into an upcoming movie, something referencing Spider-Man, Thor, Black Panther or Infinity War would make sense. Possibly Infinity War, since Thor was already referenced in Doctor Strange's stinger and unless they go to earth at the end it would be odd to have a tie in to the earth-based Spider-Man and Black Panther in a space movie.
- The Guardians being hired to save Zenn-La from a certain world eater.
- Ego meeting Starfox.
- Adam Warlock. Considering how a version of his "sister" is one of the main villains of the series and this is the last "cosmic" film before Avengers: Infinity War, it would make sense for him to show up near the end.
- Rocket coming across a puddle of black goo and just brushes it off. Unbeknownst to him, the goo quietly slithers away somewhere deep in the Milano where it remains until the Guardians come to Earth in Infinity War, where it comes in contact with a certain webslinger.
- Jossed, James Gunn has said frequently that there are no Infinity Stones in Vol. 2.
- Semi-confirmed, and hilariously subverted. Both find each other to be physically repulsive, being from different species and all.
- Very much confirmed.
- There is a bigger twist — Ego is a villain.
- James Gunn explained that Kurt Russell's form is an "avatar" created by Ego manipulating his own molecules.
- Supporting this is that Yondu is the only Guardian not be in the cast of Infinity War.
- Apparently jossed on the Yondu dying WMG since this showed up.
- It will be called Guardians of the Galaxy Christmas Boogie! The Guardians save Christmas from an alien out to kill Santa Claus, a being who is the Anthropomorphic Personification of the holiday itself. They are aided by Buddha, Krishna, and Manaf, who don't want American Christian conservatives to unjustly blame them and their friends for Christmas's destruction.
- Alternatively The Essential Guardians of the Galaxy.
- Guardians of the Galaxy: The Third Whatever
- Probably Jossed. The latest trailer has her hawking an Assimilation Plot.
- Considering they're "cleansing" the galaxy of 'weakness' and seeking Ego's mysterious genetic code for their own purposes (probably the creation of a master race) so this seems super un-Jossed....
- Fridge Logic: That is false and she had no such plot in the movie. That was Ego's thing.
- We don't see enough of the Sovereign society in the movie to know for sure. They are supremacists though, with very high opinions of themselves.
- Close. [[Spoiler: Yandu gives him a Zune with 300 80's pop songs on it.]]
- Jossed. The Sovereign have no plot in the movie beyond wanting to kill the Guardians for personal reasons. By the end, Ayesha is more determined then ever to kill them.
- More than likely Jossed. James Gunn has already said in multiple interviews that the Infinity Stones are not involved with Vol 2.
- Jossed. She would of used the stone if she had it.
- Confirmed. The bigger twist is that Ego is the main villain.
- Confirmed. Ego needs Peter to accompany him in assimilating the universe.
- Jossed. Yondu dies at the end.
- Stakar banished Yondu for his theft of Peter (stealing Peter likely cost the Ravagers a lot of money and reputation) or for his perceived softness regarding Peter.
- Jossed. Yondu was banished for delivering Ego's various children to him; child trafficking is against Ravager code.
- Jossed. Venom is getting a Sony film.
- Addition: One of the capability of Infinity Gauntlet with all the stones? Revival. That's how they restored the universe in the comic.
- Here's an idea: Each main character gets one wish with the gauntlet, Peter has to agonize over whether to save his mom or Yondu.
- Perhaps Drax will perform a Heroic Sacrifice, but will get a wish. He will try to bring back his daughter...but it turns out she survived years ago and is now out there in the universe fighting evil as Moondragon. An overjoyed Drax brings Yondu back to life, with his Last Request being that the Guardians find Moondragon and let her know how much he loves her and that he never stopped trying to avenge her mother.
- Admittedly I greatly dislike this idea to begin with, but why do we have to lose Drax in such a scenario, especially when he had no personal connection to Yondu?
- Jossed. Yondu isn't even mentioned in Infinity War. In all likelihood Rooker was just doing his part to throw off the spoilers. Additionally James Gunn has said that the impact of Yondu's death needs to be lasting and to bring the character back would be "cheap" and "dishonest"...so sorry, Yondu fans, but a resurrection is simply never going to happen.
- Jossed. At least as far as Infinity Wars goes. Guardians 2 made it quite clear that Ego was the source of Quill's powers, so barring an Ego resurrection it's doubtful that Quill's powers will ever resurface. Furthermore, Quill with superpowers was fun for a single movie, but for him to have it on a permanent basis would fundamentally change the character, and for the worse IMO.
- That doesn't Joss the theory, since the theory is that Ego was lying about being the source of his powers and was acting as training wheels for him to more easily access it. Quill hardly knows how his powers work, so him thinking he no longer has them isn't proof that that is the case.
- Ego seeks Peter out specifically because he hears that he's capable of wielding one for any length of time. If touching a Stone kills any and all mortals in seconds, but a Celestial can wield one long enough to blow away an otherwise invulnerable target, what might a Celestial be able to do with knock-off of a Stone AKA an Arc Reactor? The combined teams could be in the middle of getting their asses kicked when Peter is flung into Stark, whereupon his hand lands on Stark's chest and Peter suddenly finds himself capable of once more wielding a lesser form of the power he used against Ego.
As Eternity IS the essence of the Marvel universe, Peter as a Celestial could be powerful enough to either manifest or hold it. He could use his power to match or disable the Infinity Stones to give the Avengers a fighting chance or to resurrect allies.
If Infinity War ends up being Devastating (and the last movie of several actor's contracts) he can use his power as/connection to Eternity in order to "remake" the universe as Ego wanted... just to be closer to what it was initially. It may not be accurate, and could require Peter to write himself out of reality as is, but as Eternity, well... it's a decent trade off.
- If by "Critical", you mean "causing Thanos to win"...but he's still not Eternity.
- If he is The One Above All, this adds a new reason to why the Watchers got bored of his stories and left. To them, Stan is among the most powerful beings in the entire multiverse. They'd probably gotten bored because they were expecting stories about his epic adventures or feats, not about his time spent wandering about a fairly insignificant planet (to them). Or if he is Uatu, maybe they simply heard his FedEx story too many times.
- Ben Browder - He's just kind of hanging out in the first space battle as one of the goldskins, then disappears. It'd be a big step up for an actor primarily known for his television work, but he is well-known in the SF community and could bear the part well.
- Armie Hammer - Or at least if he doesn't get to be Hal Jordan
- Given that Hal Jordan isn't in that movie at all AND that Armie Hammer has recently revealed that he was never even in talks for the part, it isn't that crazy to think he'd be available for Warlock.
- Alexander Skarsgård- but then, his father is also in the MCU. If there's going to be a scene of them together in the near future, cue Dr. Selvig mistaking Adam as his son.
- Nikolaj Coster-Waldau- he could play him after Game of Thrones is finished. Then, cue the golden hand jokes once he got the Infinity Gauntlet.
- Wang Leehom
- Ryan Guzman - He's been in some superhero media before, so perhaps he would like to play in the big leagues. Adam could be a good Star-Making Role for a younger actor like him.
- Brenton Thwaites
- Nathan Fillion
- Omari Hardwick
- Regé-Jean Page
- Ethan Josh Lee
- Zendaya Coleman
- Ki Hong Lee. He's relatively young and handsome and has experience in both comedy and action.
- Taron Egerton
- Ansel Elgort - he'll get along with Star-Lord when it comes to having great taste in music.
- Or maybe Adam will also think Taserface is a cool name. He won't exactly be the most worldly man, having been made to be a weapon.
- More likely is the fact it was simply the fact the one she had was the Reality stone, which on its lonesome isn't *too* intense, all things considered. The Power stone is the embodiment of all energy that ever was and ever will be in the universe. The Power stone is what gives infinite power to all of the other stones in the gauntlet - without Power, the others are much, much more limited in scope and ability.
- But Mantis remembers Ego finding her after her biological parents abandoned her as a larva. Ego had Yondu deliver all of his children to him and if Mantis was one of them, he'd remember Ego sparing her.
- Yondu didn't deliver all of Ego's offspring, just some of them. Ego has been trying to breed a Celestial heir for a very long time, probably a lot longer than Yandu'd been alive let alone for hire.
- Jossed for Infinity War and Endgame.
- Adam: I AM ADAM OF THE SOVEREIGN, CHAMPION OF THE WORLD of perfection, AND YOU FOOLISH GUARDIANS MUST PAY FOR THE MANY CRIMES YOU HAVE COMMITTED AGAINST MY WORLD!!
The Guardians will be unimpressed and tired of crap like this.
- Adam: CRIMES SUCH AS THIEVERY, DESTRUCTION OF OUR FLEETS, AND-Peter: Rocket?Rocket: On it *Fires a gun right at Adam, temporarily knocking down.*
- Better yet, it stopped just barely in time, but Drax started yelling in pain anyway, purely to mess with Kraglin.
- Jossed. Avengers: Infinity War reveals the Soul Stone is on the remote planet of Vormir, and won't come out unless you sacrifice someone you love.
- Alternatively, she'll have to force Banner to become the Hulk in a desperate hour.
- Jossed. Mantis and Banner never meet in Infinity War.
- Once Rocket and Tony bond after chatting, this could lead into the technical-discussion scene that's been suggested on the Avengers: Infinity War WMG page.
- Jossed. Rocket and Tony never meet in Infinity War. Rocket does have a heart-to-heart with Thor, though.
- Building on the above, Adam becomes Magus after taking the path Quill didn't take and accessing Ego's Light
- As Adam's behavior becomes more arrogant, imperious, and sanctimonious, someone will comment that it must be the Ayesha in him.
- To emphasize this, Adam will listen to lots of Millennial music, leading to some friction between Quill and himself.
- Alternatively, they could cast Zendaya.
- Jossed. She isn't very active in Infinity War.
- Quill: Adam. We're the Guardians Of The Galaxy. You've been trying to kill us this whole time.Adam: What? You lied to me?Quill: Yeah dude. We did.Gamora: You're not upset?
- The Nostalgia Critic will love it.
- Jossed. No sign of resentment.
- That last part is possibly Jossed. It is specifically stated in Infinity War that Thanos decimated Xandar when he stole the Power Stone from the Nova Corps, so none of that destruction was reversed when the Snap was undone. The power vacuum created by the damage to Xandar may indeed be a factor, however.
- Jossed. Infinity War revealed that after the events of Guardians 2, Nebula went after Thanos on her own.
- Yep, replaced. The Guardians' new M-ship, the Benatar, is a different class than the 2-seat and 4-seat variants we've seen previously. It has a double-decker cockpit extending down to the lower deck (with more front-facing seating), a new engine layout, and a small auxiliary vehicle that docks in the back (similar to the Ghost from Star Wars Rebels). Additionally, several months after Vol. 2's release, we learned more about the repair tool Rocket was using on Berhert. Specifically, that tool is not at all cost-effective to deploy, and since after the end of Vol. 2 the Guardians have the Quadrant (and presumably whatever vehicles are docked to it), it would have been wiser to return to Berhert simply to gather up whatever important stuff was still there, then just abandon the wreckage and purchase another ship.
- Confirmed, although its origin is not revealed.
- Sorry, didn't happen in either Infinity War or Endgame, and looking unlikely going forward. His new outfit post-Endgame ditches the huge fanny pack in favor of a much more streamlined utility belt with just the holsters for his blasters and two tiny pouches (presumably for power/ammo cartridges).
- Confirmed via an interview with James Gunn. As it turns out, the Groot that appears in that scene is the Infinity War Groot CGI model, suggesting that the scene might even be set in 2018. (In the interview, Gunn wasn't interested in precisely nailing down the date.)
- If the scene does happen in 2018, then it would be even more Hilarious in Hindsight as Groot will be complaining Peter is "boring" even as as the team is getting ready to fight Thanos.
- One way Ego could have survived is by transferring his consciousness, or part of it at least, to one of his seeds. The "light" would be gone from the original planet, leaving Quill without his powers.
More related to the theory however, is the connection between the Mind Stone and the Power Stone, two of the Infinity Stones already seen in the MCU. In the Wikipedia article about the comic versions of the stones, it says, "Backed by the Power Gem, the Mind Gem can access all minds in existence simultaneously." If this holds true for the MCU versions as well, or if a similar connection exists, Peter having held the Power Stone, which is connected to the other stones, might have allowed Ego an escape conduit. Ego could have thrust a piece of his consciousness through that conduit, where it ended up inside of the Mind Stone.
To further the theory, Vol. 2 takes place a mere 2 months after the retroactively titled Vol. 1. This would have it happening either just before Age of Ultron, or nearly simultaneously with it.
The Mind Stone was contained within Loki's scepter. After the first Avengers movie, the scepter was taken by S.H.I.E.L.D., who were controlled by Hydra. Hydra would have had possession of the scepter for a long time, months at least; if they didn't have it the entire time, they would have taken it during the Battle of the Fridge, around the time of Captain America The Winter Soldier. Baron Strucker was a ruthless scientist with all of Hydra's resources at his disposal. He had months, at least. While Stark and Banner are beyond geniuses, the idea that they could do something in days that Strucker couldn't in months is ridiculous.
Beyond that, Tony admits that they shouldn't have been close to success. J.A.R.V.I.S. expressed the same thing when he met Ultron. Either what happened was a complete accident (implausible, but not impossible), the Mind Stone is sentient (scarily possible, but still unlikely), or something outside of Tony, Banner, and the Stone interfered. That something could have been Ego.
When Ego died, his consciousness could have transferred into the Mind Stone. The Mind Stone could then have expelled him into the virtual world, giving him new life- albeit without his memories.
Ultron and Ego have very similar origins. Both were born alone, frightened and in darkness. Ultron did have Jarvis, but he wasn't much comfort. Both sought out a purpose in life (I don't get it- the mission. Give me a sec...) and upon meeting other lifeforms, became very disenchanted with them. In the end, both sought to remove this other life from their world, and become the sole living thing.
- Ultron: When the dust settles, the only thing living in this world... will be metal.
—> Ego: Soon, Peter, me will be all there is, so STOP PISSING ME OFF!
Also, both have plans that require them to create new life (Vision and Peter) in order to succeed, and that new life ends up killing them.
They also take on similar physical forms during their lives: Ego starts out as a floating blue brain; Ultron starts out as a disembodied program represented by a blue holographic ball. Ultron's first body is a zombie-esque hodge-podge of parts; Ego's first body (that we see) is shot by Peter several times and ends up looking very similar. Half the face gone, one arm useless, significant chunks of the body missing. Later, Ego renders himself as a giant head made of rocks and energy, with a gaping circular maw. It looks disturbingly like Ultron's face after it's half melted by the Avengers. Right before his final battle against Peter, Ego reforms his human body from the skeleton on up. For a significant time, it looks like a living anatomy lesson, with strips of muscle exposed over bone. Ultron's Prime form looks like a metal version of this.
They even have similar centers. The way the conduits stick out from Ultron's spherical "heart" looks a lot like the struts surrounding Ego's planetary core.
Finally, their mentalities are strikingly similar. They are psyschotic manchildren with god-like powers who can feel sympathy for others but cannot empathize with them. They use blue-and-orange morality in an attempt to justify their selfish actions. They convince a young powered woman to help him, and treat her like how they imagine one would treat a daughter, and fail to understand why she turns against them.
One last bit: when Ultron is first "born", the first thing he starts to say is, "Where's my body?" The question the audience should ask is, why does Ultron think he needs a body? He hasn't learned anything about humans yet; he should have a child-like belief that everyone is a disembodied program. Instead, he says it feels wierd and wrong. Later, he tells the Avengers that he was asleep, or in a dream. If he was between lives, it would likely feel that way.
- This. Is. GENIUS!
- A friendly ally during a battle in the opening scene
- A cameo in a montage of some sort
- Filling the role of the Nova Corps (after they likely got curbstomped by Thanos in his pursuit of the Power Stone), as the stick-in-the-mud law-enforcement figure tracking the Guardians down, amidst the main plot (Think Payton's role in Ant-Man)
- An alternative to the above, but rather than the Guardians, she's actually interested in/tracking down Adam Warlock
- A post-credits stinger.
- Bonus points if she's offered a spot on either Quill or Stakar's team, but refuses.
- He could play the Magus.
- Once Ego is destroyed, his extensions of himself on the planets melt, evaporate, or just straight up disintegrate, everyone who witnessed this event and survived had their memories rewritten to explain the destruction, and everything related to Ego (except for Peter Quill, obviously,) is wiped completely from existence. The only ones with any memory of him or what he's done are those that were personally involved with the event, specifically the Guardians of the Galaxy and Nebula, and even then, the whole "Expansion" becomes a mere blip in the MCU timeline, never brought up in the future unless by those personally involved. So essentially, the being who wanted to assimilate all life into himself and become everything only ends up becoming less than nothing. A fitting fate for such a fool.
- Chronologically, this would not only be a sequel to Guardians of the Galaxy Vol. 2 but also a prequel to Thor: Ragnarok, taking place either before or simultaneously with Captain America: Civil War.
- Thor and his fellow Asgardians would meet the Guardians for the first time via a casino fight.
- Adam Warlock would start off as a bad guy, but later pull a HeelFace Turn and join both teams midway through the movie.
- Star-Lord will eventually return to Earth for the first time since his abduction, either during the climax or near the end.
- As with Vol. 2, there would be five stingers:
- To set up Thor: Ragnarok, Big Bad Hela would whisper into the mind of a dying Odin, warning him that she will be freed as soon as he dies.
- We will finally see how Thanos obtained the Power Stone.
- We will also see how what happened to the Hulk after the events Avengers: Age of Ultron—he crash lands the Quinjet on Sakaar, and is captured and enslaved by the Grandmaster to become their new champion (again foreshadowing Ragnarok)
- If the climax took place on Earth, then we would see Bucky Barnes watching the news of said battle in a bar, where he is greeted by a surprise character (doesn't matter who that one is).
- Post-Avengers: Endgame, the entire movie will be revealed to have been a long story read by Thor, who then demands that they continue searching for 2014 Gamora, while the other Guardians insist they play a game of poker.
- None of this would work; the Guardians met Thor for the first time in Infinity War, where they have no idea who he is until he introduces himself. Not only that, but there's already a natural setup for Thor to interact with the Guardians more, since he leaves with them after Endgame. Additionally, If Adam already debuts and joins the team before Ragnarok, where the hell is he during Infinity War and Endgame? The Hulk factor doesn't need to be addressed either, since it's explained in Ragnarok. The proposed Bucky scene is also irrelevant or totally nonsensical; it's either during Civil War, where he couldn't have been at a bar, or right after it, when we know he's being cared for in Wakanda by Shuri. If the Guardians appeared on Earth, why wouldn't any of the Avengers recognize them from this supposedly huge fight, or try to go too said fight to contact Thor if he's there? Also, why would Thor care more about the missing Gamora more than them? For that matter, it has been said that searching for said Gamora will be a factor in the third Guardians of the Galaxy film. Sorry if this comes across at nitpicking, but this just doesn't add up.
As one of the True Fae, Ego is a fragment of Arcadia and the Wyrd; in other words, he is an extension of the Dark Dimension and Dormammu. However, unlike almost all of the other Gentry, Ego's essence is contained within the dimension of mortals, rather than a domain of Arcadia. This is because long ago Ego struck a bargain with Dormammu to exist in the physical plane, and the price he paid for this consisted of two items: his memories of his previous life in Faerie, and accepting the form of a physical True Name which could be killed by simple corporeal means rather than the coercion into Oath-Breaking which (aside from cold iron) is the only thing which can fully kill almost any other True Fae.
Aside from his unique status as a physical entity, Ego is a classic example of the Gentry in almost every other respect. He is solipsistic, and views himself as the only being in the entire universe with any intrinsic worth whatsoever. His covetousness is without limit, and his ethics (if he has such a thing) are an utterly alien case of Blue-and-Orange Morality. He is a Genius Loci Eldritch Abomination who can alter his domain at will, create human bodies as avatars, and is almost omnipotent on his home turf.
Ego became a physical entity so that he could satisfy a base motivation he shares with all his Gentry kin: to expand his domain and his power. He likely grew tired of constantly waging war with other True Fae for scraps of Arcadian territory, but saw that the plane of the mortals was almost entirely empty of his Fae rivals. He knew that he would put himself at incredible risk by seeking to colonize the tangible universe, but in the end he proved to be even more ambitious than he was fearful. He decided to take the gamble, and bargained with Dormammu for a physical True Name which would be uniquely vulnerable, but also capable of expanding and consuming the entire mortal plane. He also correctly wagered by giving his Arcadian memories as payment that even though he would not remember his "purpose"at first when he was reborn in the mortal plane, he would eventually remaster his powers and rediscover his reasons for coming here.
When Ego was inevitably disappointed by the other life-forms he encountered, finding that they came short of his own perceived infinite greatness, he remembered his motive for being born in a physical body. He then sent his flesh-and-blood "Angel of Pure Light" Title throughout the universe, doing something no other Gentry could do because of their lack of a physical True Name: fathering children. Every child he sired with a mortal woman was a Changeling from birth, and he sent Huntsmen to collect them and bring them to his planet. However, none were capable of providing him a "feedback loop" of Glamour, since Glamour cannot be harvested from Lost. Aside from having Fae magic in spite of having never entered Arcadia first, all of Ego's offspring were normal Changelings. Ego needed an exceptional Lost child who could do the (seemingly) impossible: act as a perpetual machine "battery" of Glamour production, which was the only way he could have enough power to enact his Expansion. The only Lost he didn't kill after having them brought to his planet, aside from Peter, was Mantis; even though she failed him as an infinite Glamour battery, her empathic powers still proved useful to him, as she could help him sleep. Mantis is likely a Beastling Playmate, or of a similar Seeming and Kith.
The reason Peter (who is a Fairest Lost) is that elusive perpetual machine of Glamour his father had been seeking for millennia is because of the nature of his conception: to an incomplete degree, Ego truly did love Meredith Quill. However, as previously mentioned, this was a mortal danger to Ego's plans and power; if a True Fae ever fully understands a human emotion such as true love, they will lose their godlike power. Ego sensed that his growing feelings for Meredith were slowly withering his powers away, and he would fall from godhood just as the Ancient One likely did. Without that power, his Expansion would no longer be possible, so he murdered Meredith before his affection for her could become complete and destroy his powers forever.
Because Fae magic is based on mortal emotion and his father (partially) felt genuine love for his mother, Peter was born as a True Fae demigod; existing on the border between being a Lost and being a Gentry. The sliver of sincere love which had resulted in his birth gave him simultaneous access to the raw reality-warming magic of the Wyrd, as well as the ability to produce Glamour with his own emotions, which is something that no other Changeling (or even True Fae) has ever possessed. Thus, Peter was the perpetual machine "battery" Ego had been seeking since the dawn of time.
Yondu was the Huntsman hired to collect Peter. A Fetch was not left in his place, even though Ego is capable of fashioning them with the ease he fashions his Kurt Russel-lookalike Title, for the simple reason that he doesn't remember that leaving Fetches is a "thing"; he sold his memories of Arcadia for his physical True Name, after all. By collecting Peter, Yondu was breaking his oath to his Huntsman court; the Ravagers "don't deal kids." The only way he could sate his conscience after becoming an Oath-Breaker was by getting Ego to swear by his Name that he would never hurt any of the kids Yondu brought to him. Even though his existence depended on him honoring his promise, Ego simply utilized Loophole Abuse by honoring his Exact Words; the death of each child who failed him was painless, so technically he never did hurt them. This is also why he was able to cause physical pain to Peter without endangering himself; Yondu never personally took Peter to Ego, and therefore Ego was not bound by their contract in Peter's case.
Once Ego had Peter and Peter had demonstrated the powers his father had been seeking, Ego attempted to lure Peter into becoming a full True Fae by persuading him to abandon all emotional ties he had to his home and to his friends. He almost succeeded, but made the fatal mistake of confessing to murdering Peter's mother- who is Peter's Touchstone. Peter immediately shot his father full of holes in quiet rage after thisrevelation, to which Ego immediately repaired his Title and briefly changed its Mask into the image of David Hasselhoff to mock him. He then forcibly stabbed him with an energy-tentacle to begin his Expansion by reaping Glamour from Peter for a thousand years. He crushed Peter's Walkman to get an extra surge of energy by filling Peter with grief.
Ego's planet now revealed to be, like every other Arcadian domain, a Hell disguised as a Heaven, the world's landscape became actively hostile to Peters motley of friends as they worked to rescue him. They were able to destroy Ego's Kurt Russell title, but this was a minor inconvenience to him at worst; he was able to swiftly replace it after subduing Peter and his allies. In the end, however, the Guardians managed to send Groot to the planet's core and attach a time bomb to Ego's physical True Name: the Brain. Panicking, Ego begged Peter to spare his life the only way a True Fae knows how: by expressing incredulity at the idea that Peter would want to be normal just like everyone else. Peter, of course, coldly answered, "What's wrong with that?" just before the bomb detonated, destroying Ego's Name. Now totally and completely killed, Ego's disappearance severed Peter's connection to the Wyrd; without his Keeper to act as an intermediary between himself and the contracts of Arcadia, Peter is no longer anything but a mere mortal forever separated from godhood.