More information about Tetsuya Nomura’s new RPG, Kingdom Hearts: Dream Drop Distance, has been revealed by the man himself. Nomura said that this version would have new Disney Worlds. Square Enix have not yet revealed what these will be.
Talking about Sora as Riku, it had been suggested that you’ll be able to switch between the pair but Nomura has clarified that this will be forced upon you. This, unfortunately, means that you cannot select who you play as.
In Nomura’s opinion, the key word in the game’s title is drop. Hence the reason why we can see Sora and Riku falling in the trailer.
So it looks like something fishy is going on…