Tetsuya Nomura, Producer and Director of Kingdom Hearts III & Final Fantasy XV, got interviewed while in the Japan Expo on France by Finaland and Final Fantasy Dream. One of the questions was about the Marvel & LucasArts Licenses in Kingdom Hearts 3. Here's the Quote:
Finaland & FFDream : With the acquisition of Marvel and Lucas Arts by Disney, could you imagine adding some kind of stuff from these licenses in the game ?
TN : (laughs) Of course it would be great if we could add those licenses as well. But there are lots of rules and restrictions by disney so we can’t actually put everything people want, so it’s a quite difficult decision but we’re gonna prepare some surprises for you so, just wait for the informations.
Finaland & FFDream : Because you know that Kitase-san (Yoshinori Kitase) is a big fan of Star Wars ! So you have to do that !
TN : (laughs) We’re not going to decide it whether Kitase-san likes Star Wars or not but we’ve been talking about Star Wars itself since it became Disney’s content recently. When I eared the news I was like “Wow ! Wow !”. Yeah obviously it’s gonna be great if we could add it, but like I said there are a lot of restrictions and rules by Disney so we don’t know what’s gonna happen but yeah, we’ll see.
Also in the same interview he revealed that his favorites created characters are not Cloud form FFVII but Sora and Noctis.