Even if kh 3 is real who's gonna be in it. There's probaly no more than the same worlds u can put in this and what characters are gonna be in it and probaly Donald and Goofy not gonna come with him.

I think Riku will replace Donald and Goofy

well u never know their could be 3 in one party but 2 extra like every one want to meet riku riku journeys with sora donald and goofy like in agraba sora, donald, and goofy usable characters riku and aladin

I don't think that Donald and Goofy will ever be replaced, actually. Riku might be an optional party member, though.

I do think that he'll be alone this 1 it be better that way

There probably be one new world at the end of the game

lol. What probably will hapen is as soon as sora and riku get to disney castle, the king and riku will look in the door of darkness for things. And sora donald and goofy will go on another quest and look in the worlds.