My brother showed me a movie for KHIII and said that one of the guys was supposed to be Sora grown up. There was also a young keyblade master who was frozen by the main boss in the video who split himself. My brother told me that someone had said that he was Roxas. How that's possible, I don't know. The main baddy in the video, when he was walking toward the three keyblade masters in the video, he split into to two people. Perhaps Sora learns to do the same thing.