I'm sure there will be; every game in the series has gotten a re release, and the major ones have gotten a Final Mix. However, I do feel that including it as DLC would be better, as opposed to having to buy an entirely new game. And I certainly hope the DLC is made AFTER the main game is finished. As this is a season finale, even without say a FM exclusive boss, I've got a good feeling that we'll get a number of juicy hints about what's coming next. The vanilla version of KH2 even had a pretty big reference to Terra, Aqua and Ven.