I saw Wolf Kanno's thread and thought it was going to be something about if SE would ever return to this story/universe. They returned to FFVII so late in the game, so it's always "possible".

I think probably the story would revolve around finding out that Vivi is in fact, NOT dead, and you're on a quest to find him. Or Kuja. Whatever.

Basically FFX-2, now that I think about it.