All 4 of these are will definetly be a part of this story
Infinite Stratos
Highschool DxD
My Hero Academia
and (actually surprisingly) Sailor Moon
That's it for now and don't worry these won't be the only Anime Casts in this story there will be more. There could also be non Anime Characters and Anime Characters that will be appear as individuals without the rest of their respective cast.
If you have Ideas for other Anime, Games, Comic, Tv Show, Movie,... Characters that could be included. You can write them as comments and if they would fit into my story then they may appear in this story.
Also important the Characters could act a bit differently from their canon counterparts because they are AU(Alternative Universe) Variants of these Characters.