Re: Worlds of Kingdom Hearts - What worlds do you want to see in KH3?
I would like to see more of the PoH worlds, overall... except Agrabah, that can stay as small as it wants... or at least similar to KH2 bar the Chasm of Challenges. I'd also like to see Aristocats and how SDG and such would change to fit the world, and Pocahontas. That's pretty much all I would like. I'm pretty sure Radiant Garden is a definite and that it should be explorable and have A LOT more to offer than what was offered in BBS+KH2.
Now, on the topic of character-specific areas, while they worked in games like BBS and DDD in which every character had a separate story, I don't think a numbered title should ever do that unless it will require the unique skills of that one person (Kairi's powers as a PoH, Riku's defenses against the powers of Darkness, etc.) Otherwise, they should all be able to visit, if it isn't a Sora-only game again.