Yeah, come to think of it... Coincidentally, Geno's situation is very similar to Sora's. Disney owns Sora but Disney doesn't have the rights to use Sora without Square Enix's involvement or approval. (For example, this is probably why he wasn't in the Wreck It Ralph movies.)
Could you imagine the licensing nightmare that is Sora? The negotiations with Disney for getting him in Smash must have been downright ludicrous...
Disney: "If you want Sora in Smash, then we want 3 cents wired to our Swiss bank accounts every time a Sora player wins an online match."
Sakurai: "You drive a hard bargain, but I think we could swing it..." (starts texting his team under the table: "Nerf Sora into the ground!")
Disney: "....but you have to make Sora good. We don't want to see any of this Little-Mac-with-a-keyblade nonsense."
Sakurai: "Hmmmm, I'll have to check with my superiors and get back to you on that." (deletes text, then starts again: "Scrub it, lads. We're boned."