@Pacack Sora isn't half-a-Disney character. Square-Enix has absolutely no ownership of him and any time Disney decides to ask for their input is more of a courtesy and respect than anything else. They obviously will continue to hire them to make the games because they have the right experience for what Disney wants. It's a common sense thing. If SE does something Disney doesn't like, they can always find someone else. They probably won't want to find another developer, mind you. It's just that it's pretty much their franchise to decide things on.
He's 100% Disney through and through. Disney just knows for a fact it makes way more sense to have Nomura handle any of the special details once you have all the Licensing complete. Who else can represent him the best than the guy in charge of the games.
Hey, I know this message is a bit old but, I wanted to answer this.
I'll bring my DISNEY COPYRIGHT KINGDOM HEARTS LAWYER hat once more in the ring to fix something about it.
Sora is Disney 100% on a basic surface, but it seems that contrary to what you says (and from what we know from interview and more through the years) it's not as easy as you explain.
The KINGDOM HEARTS
VIDEO GAME series, from different Square-Enix financial report, and investor meeting, is actually CO-OWNED BY BOTH THEM AND DISNEY
Any Kingdom hearts games developped, WILL be developped by them. If they are sent to another developper, ITS BECAUSE SQUARE-ENIX DECIDED OF IT BY HIRING CONTRACTOR.
Any decision on the licence, with
ANYTHING RELATED TO THE VIDEO GAMES needs to be taken by both Square-Enix and Disney.
Disney however owns the rights of the CHARACTERS.
However, any video-games rendition of said characters
IS THE PROPERTIES OF BOTH SQUARE-ENIX AND DISNEY
Basically, if, let's say, Disney decide to separate themselves from Square-Enix, they'd have right on the characters, let's say, Sora, Riku and Kairi, but wouldn't be able to reference, or do ANYTHING close to their video games counterpart. Or even reference Kingdom Hearts itself. They'd be completely different from the Sora/Riku and Kairi we know.
The "gentleman agreement" that everyone is talking about, is about Sora's use specifically, where, Nomura, being EXTREMELY protective of the character, basically is the one PERSONALLY greenlighting yes or no stuff happening with him (from himself in the past and even during Sakurai's interview)
But yeah, if Disney wanted to break the deal, they wouldn't be able to find someone else to make a Kingdom Hearts game, because that IP is also Square-Enix's
For the easiest source, look any Square-Enix financial reports where they show their owned IP (even on the notes, they specifically say that KH is own by both them and Disney)
Naoki Yoshida's interview with "The gamer" in 2020
And an Interview with Nomura in 2004
And heck, the interviews of Sakurai himself explaining how it was a lot because he had to go through verification for both DIsney, Square-Enix AND Nomura
Hope it helps!