SO after watching the jump festa trailer i was wondering what incarnation of xehanort that was in the cloak. The obvious answer was that it is young MX from the opening of BBS, though he appears a lot shorter and skinnier than he did in that game. One theory I came up with involves Vanitas's apearance in the trailer. He is never actually seen walking up to sora with young mx, he just kind of appears right next to him. What I was thinking was that maybe this new incarnation of xehanort is actually vanitas. The first thing that comes to mind with this theory is the part of the BBS secret movie where MX and Terra are talking. MX says something about already having the seeds of his plan planted. What if mx did something to vanitas as sort of a fail safe if he couldnt make it? For those who have seen it this reminds me of the movie Batman Beyond:Return of the JOker [though im not going to spoil that movie because its fricking insane]. Also this theory kind of brings me back to when we were all theorizing what vanitas looked like and some people thought that he was a kid version of xehanort lol.