Dangan Ronpa shares the same universe as Fallout.The SHSL Despair happened in the year 2077, but was planned decades in advanced by Junko and Mukoro's parents, who were also with SHSL Despair. The nuclear weapons that started and ended the Great War were launched under the influence of SHSL Despair. Furthermore, Hope's Peak Academy, before the Despair incident, was with Vault Tec Corporation, and Jin Kirigiri was working with them. When the students of the first game locked themselves in the academy, they were actually using trying to develop it into a Vault, which went south when their memories were taken by Enoshima. It's also a possibility that Future Foundation is a division of Vault Tec. Remember Tranquility Lane from Fallout 3? Well that could easily use the same technology as the New World Program.
Super High School Level Despair is the Product of a Hope's Peak ExperimentJunko is described as being born with a hunger for despair. Considering how much influence and technology the Hope's Peak Board of Regents have, she could have been a failed Kamukura prototype. Considering to her data analyst abilities in Dangan Ronpa Zero she probably was made to acheive the ability to analyze everything and use them for the cause of hope, but due to a messed up 1/0 binary imput on the idea of hope... The other SHSL despairs could be seen as experimentals as well, and the Despair Fever victims are simply reawakening their memories of botched experiments to create Kamukura's way of thinking. hold deep affection for a blond-haired rich guy with a bad attitude. There are a number of differences, though. Fukawa:
Gundam suffers from Chuunibyou (eighth-grader syndrome).If anyone is familiar with Chuunibyou Demo Koi ga Shitai!, then it's pretty obvious that Gundam is having the same kind of delusions that several of the characters in that series do; he hasn't recovered from them and still fancies himself a dark overlord.
Gundam is the one who cut out his own eye so that he could see despair.It was mentioned specifically in game, and it would explain why one of his eyes is gray and scarred, when the other one is red. Who else has gray eyes? Junko Enoshima.
Souda, as part of SHSL Despair, was the one who built the contraptions for Junko's executions from the first game.Even though Junko may be the Mastermind and designed all of the executions to fit her friends' despair, I doubt she's smart or talented enough to to build some of them herself, such as the rocket ship from "The Space Journey". But, there someone who is and who would do anything for her: SHSL Mechanic Souda who can build and fix anything.
The Despair Disease is actually Radical 6 from Virtue's Last RewardBoth are Spike/Chunsoft and both are diseases whose main symptom is crushing despair
The Junko body SHSL Despair found was a fake.Take a look at the execution from the previous game, the girl is nigh invulnerable.
Fauxgami is actually Togami's brother.Togami's final FTE in the first game states that he and his relatives played a game to determine who would be the heir of the family. Everyone who lost to him was disowned and treated as though they did not exist, a status that would be befitting of a SHSL Imposter who has no true self. A more in-depth reasoning can be found here.
Peko was never corrupted by Junko's despairShe just went along with it because Kuzuryuu did.
Nidai is actually SHSL Eyebrows.
Owari was the student who starved herself for despairThere are two students who love food, one of these is Owari. At the end, we see a picture of an emaciated, leathery hunger worn student. Who would go deeper than Owari into despair without food? It's been speculated that Monobear wanted to mock the students for what they did: for example, the above speculated Kuzuryuu plucking his eye out, and in Chapter 5 Monobear starves everybody until a murder is committed, and Owari is still alive in that chapter.
Nanami is still aliveWhile she probably didn't survive the Forced Shutdown, the copy of her on Jabberwock Island was probably not the only copy of her. As an AI she can be copied onto alternative hardware. Seeing as Alter Ego had multiple copies of himself, Nanami probably had a few back-ups as well. Still, any copies of this nature wouldn't have firsthand memories of Jabberwock island outside of what Monokuma broadcast. Note that this means that AI Junko probably has copies as well, but since Izuru Kamukura would probably be their proprietor, it wouldn't be too much of a chore for him to destroy them.
Usami is inspired by Alter Ego's late-night talk with YamadaAfter all, he was the most enthusiastic about magical girls, and Alter Ego was eager to learn about his interests. He's also one of the only students besides Fujisaki that Alter Ego's known to have an extended conversation with.