So seeing as how disney is doing this movie, could this be a possible world in the upcoming KH game(s)? Maybe an Aladdin replacement? I'm lovin' the idea.
It's probable, but I think they're just doing well-known Disney stuff. Prince of Persia is pretty popular, I know, but a lot of Kingdom Hearts' appeal is that it visits classic Disney worlds... at least for me. Plus that would kind of detract from the children's part of the game.
I highly doubt it, just because they're making the movie doesn't mean it's Disney's possession. Ubisoft made the games right? So it belongs mostly to them and therefore won't be in KH.