okay, two things. HE says there is A member that disappears, interesting.
And now, I am so looking forward to Sitar and Book action. (Guitar Hero World Tour for Demyx?)
I think it's Axel, not Xion. I don't think the "disappearence" was permenant though. It was just that short time he was at Castle Oblivion. Then again, Xion's disappearence probably is right, but I'd just like to point out, that if Axel's a major character in Roxas' storyline and if he goes to CO during the events of 358/2 Days, that could also be the (brief) "disappearence" imo.