For theories about other subjects, see The Legend Of Korra Wild Mass Guessing Index.
Katara will not die in this series eitherRemember the fortune teller? She predicted that Katara would die when her great grand-daughter was born. Unless book 2 takes place several years after Book 1, Katara most likely will not die.
Korra will give us the future of the Avatar cast.Who ended up with whom, what happened to the world, Zuko's mom, post-epilogue related stuff, Toph's parents,
The Gaang are/were the senior members of the White Lotus.Aang or Zuko was the Grand Lotus after Iroh, and Katara, Sokka, Toph and (maybe) Suki had the same ranks as Pakku, Jeong Jeong, Bumi, and Piandao.
How the Gaang died.Given the 100+ lifespans we've seen before, I highly doubt everyone died of natural causes. Here's how I think everyone died.
Katara will die during the series, likely in a season finale.
Azula broke out of prison (or wherever they were keeping her after she went insane) and killed everyone from the first series in a fit of madness before killing herselfBecause there is no way EVERYONE from the original cast could have died unless some serious shit went down. Especially since Bumi lived to be over 100 years old.
The Equalists caused the death of at least most of the Gaang.Most of the Gaang are benders, and pretty famous ones at that. They would be the movements first targets. Suki and Sokka were also targeted because they were friends with bender, or they died protecting their friends. Some of the Gaang may have died because of other reasons, but mostly its the Anti-Benders fault.
The main cast of the previous series died heroically while taking down a four hundred foot tall purple platypus bear with pink horns and silver wings.It makes sense.
Sokka will have gone on an epic quest to get his Space Sword backAnd then become the greatest swordsman in the world, and taught it to many of his fellow Southern Water Tribespeople.
Sokka will be a sword master like Piandao.He'll have his own idiosyncratic (and comedic — this is Sokka) way of "testing" students if they're truly ready to learn. Like Piandao, he'll also be a senior member of the Order of the White Lotus.
Azula/Sokka happened after the war, and was key to the founding of the Equalist movement.In short, Azula's mental health improves significantly, caused by(or leading to) a Heel-Face Turn. In an attempt to make up for her past actions, she helps with the founding of the United Republic, becoming romantically entangled with Sokka in the process. Suki doesn't like this one bit, obviously, causing the founding of the Equalists.
Iroh is still alive, and doesn't look like he's aged at all.Probably not, but I would be very happy if this was true. It'd be even better if he was also breeding dragons (to try to keep them from going extinct.)
Zuko will be this series' Iroh.I could already see him teaching Korra about the balance between the four elements, just like what Iroh taught to Zuko in an episode. Bitter Work, maybe?
King Bumi will still be alive in this seriesAvatar Kyoshi lived to be 230 years old; who's to say Bumi isn't alive and well at the age 182 as of Legend of Korra? Also of note, if you check his age on That Other Wiki it doesn't say that he's deceased as of Korra, while it does say so for the rest of the Gaang. It could be a simple oversight, but then again it may not be.
Aang didn't die of old age.All it takes is some simple math to reach this conclusion. A:TLK takes place 70 years after the first series, and Korra looks to be about 16 judging by the concept art. Therefore, Aang died when he was about 66 (12+ 54). Considering powerful benders like Iroh, Bumi, Pakku, and most Avatars live to be much older than this, it isn't much of a leap to assume that Aang died, not of old age, but instead in a manner very similarly to how Roku did: he was either murdered or left for dead, possibly by someone he trusted. Assuming this is true, the principal question concerning Aang's death isn't "How did he die?" but rather "Who killed him?"
An 82 year old Toph will teach earth bending to KorraLikely Jossed; rumor is that Korra will already be a master of everything except Air. Which isn't to say that Toph wasn't Korra's instructor; just that it will be backstory either way.
Toph was a Grade-A Mama Bear.First of all, it gives a nice contrast to her parents. Second of all, Chief Beifong has some fairly large scars on her cheek. No matter how she got them, it's hard to imagine that the person responsible got off without a bunch of rocks in their face.
Toph still lives, but she's totally blind now due to diabetes.Toph developed diabetes in her old age, and, after treating her doctor's dietary rules with the same respect she showed any other rules, ended up needing to get both legs amputated below the knee. What tremor-sense Toph still has left is pretty lousy, and she needs a live-in nurse to help take care of her. She spends most of her days alone in her luxury mansion, eating food she hates, listening to pro-bending matches on the radio and daydreaming about the springtime of her life when she was still the champ.
While she helped train them, Toph was never officially a member of the police force.Unless she mellowed out from old age, becoming a police officer seems out of character for Toph. Too authoritarian. While she might have helped out in the event of a major emergency, she was never officially a member of the force.
Ty Lee will or will not reappearWill Not: She is a minor character, arguably the least important of the main characters Will: Could be a chance for more screen time seems like she would live long techniques could be used by antibenders.
Ty Lee, Sokka, and Suki will all receive a major in-universe Historical Hero Upgrade... by the Equalists.Face it, Team Avatar is going to have a lot of plays, operas, and novels written about them. Heck, by Korra's time there will probably be silent movies about them. But the social movement that will give rise to the violent Equalists didn't come out of nowhere. So who will artists sympathetic to the anti-benders — or artists simply looking to make a buck off them — re-purpose history for their propaganda purposes? Simple: they'll give the non-benders surrounding Avatar Aang Historical Hero Upgrades. Suki will be a feminist-ish figure for Earth Kingdom women, important in a now-industrial society that has men and women sharing roles, with the benefit over Toph that she's a peasant who made good. Sokka is the male non-bender who could hold his own alongside the greatest benders of his generation. Ty Lee can be the "good German" who was Fire Nation but wasn't guilty of her nations crimes. In fact, she turned against her own crown princess, and not merely out of friendships, but, according to writers of a certain political bent, in the name of justice and human decency against bender oppression. (Mai's contribution here is minimized by the Equalists, since she was a 'traitor' who was romantically involved with the Firelord.) Moreover, Ty Lee can be a feel-good figure for the people of Republic City in terms of multiculturalism, as she left her homeland to live abroad amongst foreigners.
Wang Fire will become a major icon of the EqualistsGoing through some old bureaucratic paperwork, Fire Lord Zuko will find mention of a Private Wang Fire who died heroically fighting against earthbenders and waterbenders. Knowing full well that "Wang Fire" is just Sokka's alter ego (perhaps hearing of the events from the Gaang himself), Zuko will expunge "Pvt. Fire's" name and "deeds" from the records, as he technically never existed. However, as Fire's sergeant said, "his memory lives on," and the bearded Sokka's "final battle" will grow upon the years into an epic tragedy, with Wang Fire fighting heroically against a vast army of Earth- and Waterbenders until his inevitable demise. The anti-benders will note this and seize on Zuko's erasure of Fire from the records, claiming it to be Benders jealously hiding the fact that non-benders can be just as Bad Ass - or even more so - then those who bend the elements.
The compound wasn't Aang's idea.While Aang knew that something had to be done to keep an Avatar from going missing like he did, he only realized it near the end of his life and he didn't have enough time to come up with a specific plan. So he basically told the White Lotus to handle things for him. When he finally meets Korra as her Spirit Advisor, he'll explain what happened, but apologize to her nonetheless.
Zuko will have a cameoNow that we know he's alive, he'll have a very short just-passing-through appearance, possibly as a Big Damn Heroes moment. My wish is for Zuko to intervene in a fight with the Lieutenant, grabbing an electrified kali stick and redirecting the charge into the Lieutenant's face. Then he can teach Korra how to redirect lightning off-screen, if she hasn't learned that yet.
Hiroshi Sato was sponsored by a member of the Gaang.Probably Sokka. He was having his shoes shined and was doing small talk with this boy who started to gush about his dream of making motor transport reality for everybody. Needless to say, Sokka would be incredibly exited over such a technological achievement, and cough up the cash for the prototype on the spot.
Yakone killed SokkaLook carefully at that vision flashback which shows the grown-up Gaang in "The Voice in the Night" - Aang looks furious, which is not at all typical for him. Something really bad must have happened to get him that pissed off. Something like one of his friends being killed. We know it can't be Katara or Zuko since they're still alive. My bet is it was Sokka, who was specifically confirmed in the first episode as having died. We see Sokka in the flashback too, with a very serious - pained? - expression on his face. And the Yakone incident is apparently still a sensitive subject with Tenzin 42 years later. My guess is that Yakone was a rogue bender (perhaps even a bending supremacist) and Sokka's death at his hands had something to do with the start of the Equalists - if even a skilled and experienced warrior like Sokka can be cut down, what non-bender is safe? Perhaps the Equalist movement even started with Suki and the Kyoshi Warriors, who are already established as having learned chi-blocking from Ty Lee.
At least some people from the first series took up pro-bendingZuko and/or Katara could almost certainly get into a sport like pro-bending. It seems even more like something that would appeal to Toph, but she would be disadvantaged because she couldn't see any of the flying elements. It would be in-character for Haru, Bumi, or anyone from the Earthbending tournement (especially The Boulder) to be their third man. Hell, they might have even invented the game.
Sokka started the equalist movementHe didn't have any harm intended when he started the movement. He just wanted equality in the workplace and in quality of living between benders and non-benders. Unfortunately many of his followers bore deep resentment towards benders and tainted his idealistic campaign to something more hateful and radical.
Some more Zuko theories:
Toph is alive.This is based entirely on Hiroshi's "Not even your renowned mother can bend a metal so pure" statement. Note that he says can, not could.
Zuko's official title now that he's retired:Fatherlord
Azula killed everybody's parentsAbout fifteen years ago, Azula escaped from her prison and started committing random acts of violence in an attempt to destabilize Republic City (or maybe she's just that crazy now) She killed Amon's parents and burned Amon, but couldn't bring herself to kill him, because now he reminds her of Zuzu and she ran away. Then she killed Asami's mother, and then she killed Mako and Bolin's parents.
Zuko and Katara will both be back for the season 1 finale and help take back the city while Korra goes for Amon
Suki was the prosecutor at Yakone's trial.Brown hair, gray eyes, and a sharp, confident voice that could've been shaped from years of training a militant group of Badass Normal women. You◊ be the judge◊.
Katara is not allowed in Republic City because she's a bloodbender.The very act of being a bloodbender seems as illegal as using it. Katara doesn't appear in Republic City in flashbacks or modern day.
Zuko will act as mentor to either Asami or Tarrlok.He knows how it is having a villainous parent and gives some pretty good advice after his escapades as firelord, not to mention as a father.
Sokka grew up to be a great artist.His work would be well-known around the world.
Sokka died recentlyEven though Sokka is her brother it seems odd that Katara would only mention Sokka by name when listing the dead, so it occurs to me maybe until recently Korra knew Sokka.
Iroh II was born shortly after Iroh's death.Benders do tend to have long lives, so it's possible.
Sokka died childless
Azula is still alive and acting as her niece's advisor.Well, I always preferred to think that she eventually was cured and became, if not a good person, then at least capable of functioning in a civilized society. She should resemble Lo and Li from the original series, and give hard, cynical advice to balance her niece's inherited idealism with realities of ruling a kingdom — much like Ozai seems to be doing for Zuko from behind the bars in The Promise.
Zuko never became an avid tea drinker like Iroh, but instead became a coffee loverOne of the things he did as Firelord was reconnect the Fire Nation with the Sun Warriors in order to spread the teachings of their more spiritual Fire Bending. One of the things the Sun Warriors then introduce him to is a local drink brewed with the seeds of plant that grows around their temples - ones that look a lot like beans. This never sits quite right with Iroh, but Zuko loves it.
Katara doesn't remember how to bloodbendBending techniques are skills, that like any other, you'll forget if you don't keep using them. Remember Katara's reaction when she first used bloodbending? She certainly didn't seem like she was ever going to use the technique again. Since it's been 70 years since she last used bloodbending, it wouldn't be a surprise if she simply can't put it into practice again so easily. And this was why she couldn't fix Korra when she was debended. She didn't remember how to properly bloodbend to even try to undo Amon's bloodbending.
We'll be seeing Yue again in season 2The next book is called Spirits,is focusing on the spirit world,and of course Yue is the Moon Spirit now..
At least part of the reason why Zuko's reign was so long was because he didn't want his (oldest) daughter to have to deal with the stress of running the Fire Nation and raising children at the same timeFrankly the fact that Zuko gave up the throne at all is unique and completely against everything monarchy stands for. The Crown is a Divine Given Duty given to you through your Royal Blood rather than a job you can retire from. His reign was so long because he took the throne at sixteen and is still alive at 86. The fact that he surrendered it to his daughter at all is extremely un-kosher and may or may not be tied to the fact that Aang died and he must now cover for him, playing the peace-keeper until the new Avatar is ready to take over (my favorite WMG by the way)
Aang didn't mean to favor Tenzin, he just did
Zuko wears the Crown Prince topknot crown.The last actual Crown Prince of the Fire Nation to actually wear it was Sozin, who gifted it to Roku as he was leaving to begin his Avatar training. Since then, the piece has become more associated with Roku than with the Crown Prince (as evidenced by several depictions of Roku wearing it). To evoke the imagery of his maternal great-grandfather, Zuko wore it during his time after abdicating the throne and being a wandering Ambadassador, proverbially holding down the fort for Aang's successor.
Azula is the female Fire Sage from "Beginnings."They both have similar appearances.
Zuko will visit Iroh in the spirit world now that it's open to humans.Self-explanatory.
Zuko will appear, but not until Book 4They're gonna make us wait.