Sakurai and Square Enix: [awkward cough]

I keep saying, I'm almost certain Disney would love to have Sora in Smash, since he's one of the few properties they own that originate from a video game, and the only popular one, so he's pretty much the only way Disney could ever be involved with Smash.
It's Square Enix that most likely will be incredibly uncooperative, considering how we have close to nothing for Final Fantasy in Smash besides Cloud himself, so the chances of them allowing Kingdom Hearts in is incredibly slim, no matter what Disney is thinking.