If they are going to put Star Wars in Kingdom Hearts (3 or future KH games), I think they should make Darth Vader a secret boss. He could show up in a possibly new arena or in the Coliseum. Either way, I just want to see Sora and the gang fight one of the most iconic villains in film history.
The movie probably wouldn’t work as a world, but I wish you could fight the Sanderson Sisters from Hocus Pocus as a bonus boss. Picture it: go to Halloween Town, find an old house containing a candle and a cauldron. Choosing to light the Black Flame Candle triggers a boss fight against all three witches.
Each one would have her own HP bar and fight individually until Winnie screams “SISTERS!” and they all attack at once, kind of like Prison Keeper.