Also, Nomura is subject to change his stance on his own made-up "rules". Just because he has said there never be an FF world, doesn't mean he can't change his mind. We've seen his opinions grow and change from the start of KH, whether it be towards the characters, whether it affects game's writing, etc.
In just the same way he can Disney-fy characters, I'm sure there's a creative team capable enough of Disney-fying an FF world or merely a location within any numbered universe's world, such as Cosmo Canyon or Lindblum (hell, there's a more all ages FFIX animated series being spun right now). See: Deep Space / Olympus Colosseum, etc. I'd never get my hopes up for it, but it's definitely not impossible, and as we run into more of the same Disney properties re-used again and again, it's an accessible avenue towards injecting more variety.
In just the same way he can Disney-fy characters, I'm sure there's a creative team capable enough of Disney-fying an FF world or merely a location within any numbered universe's world, such as Cosmo Canyon or Lindblum (hell, there's a more all ages FFIX animated series being spun right now). See: Deep Space / Olympus Colosseum, etc. I'd never get my hopes up for it, but it's definitely not impossible, and as we run into more of the same Disney properties re-used again and again, it's an accessible avenue towards injecting more variety.