I'm new here and I have no idea if this has been attempted before but I know each and every time I have tried this, it has always turned out considerably different so I thought it could be fun.
Anyway, the idea of this Multiverse story is that Earth (the one we live in) is the center of all universes. These universes are many in numbers and influences often leak through into our universe, giving us television shows and movies, as well as games. For example, one universe could be a Naruto universe and all of the events that make up the manga/anime come from an actual universe where the characters are real people.
Anyway, the point is is that these universes have begun collapsing in on themselves, dumping different characters into the Prime Universe or our Earth. So the general idea would be that you get to play as any character you like (for example, Superman or Batman or your own OC) that wound up dumped on this planet and is struggling to find out why the Multiverse is collapsing and how to fix it so everyone can go home.
So... anyone interested?