Haunted Mansion! Hound Dog and I were talking last night and he suggested it. I shot it down because I didn't know who the hero would be. Then he reminded me that there doesn't have to be a hero. After all there wasn't one in Wonderland.
Also I agree with the fact that there will be a Sleeping Beauty level at the very least, if only because
The one loose end that KH2 didn't tie up was the whole Maleficent thing at the end. She takes care to note that after this is all over that castle will be hers. I don't think the Heartless could have killed her. Pete, maybe....
I wouldn't complain because, it's one of my faves! Some sort of thorn thicket thing would make for one heck of a final battleground.