So I was thinking with the current state of the story with shigaraki being kinda too powerful to lose, what If he actually destroy Japan hero society and take over part or the whole country. Meanwhile certain but not all the hero flee to the US, we would people like Deku fleeing to be trained over there, some members of UA also including Eri and Lemillion. And shigaraki would stick to Japan during that time because of rebellion in Japan and the menace of every hero in the world ( true he is extremely powerful and unbeatable right now but having every hero against him would still be hard task. ) There is also the fact that the author like comics, so I guess it would be great for him to put a part of his story in the land of comics.