
 Originally Posted by 
Squenix
					
				 
				"Basically there are worlds that fell into darkness besides the ones  Sora returned to normal in the first Kingdom Hearts -- some of the  princesses' worlds, Dumbo's world, and so on. The original story had all  these worlds get fixed up in KH1's ending, but not all of them  completely returned to normal, instead lying in stasis between light and  dark. Since the worlds themselves are asleep, the game is set in the  dreams these worlds are having. It's Sora and Riku's job to wake these  worlds up, return them to normal, and gain their Keyblade Master  certification."