Well if Zexion is alive, then we have the connection to the secret ending which Nomura mentioned, but only if Zexion lived back in the time in which the secret ending showed. If you take out the X in Xehanort's name, it spells out "No Heart" and "Another" which would relate to Zexion, who is "Another" with "No Heart".Darky Dee said:Eh, I love the theories, but one thing to be focused about is Zexion's weapon.
Notice on his spot in the World that Never Was in the Organization XIII's stronghold, there are glowing stones on the floor before you go fight Xemnas the first time.
Zexion's weapon image was broken, not revealling anything. I may also remember reading that if Tetsuya was to make KHIII, which I'm pretty optomistic of, that Zexion's weapon would play a major role in the game.
(Note: I don't have any proof to back up on what I read at all. Yet.)