You know, everyone keeps mentioning that they should have left it with the movie Advent Children. I really think that this depends on how exactly Advent Children ends.

Vincent seems to be playing a fairly important role, as he is seen interacting with Cloud more than the other characters do. Really, the only other person we've had screens of Cloud with is Tifa in the church, presumably after her fight with Loz. Sure, they've mentioned a battle where all of the characters go against the three Sephiroth clones, but other than that, not much.

Then again, it can end well and tie up Cloud's story and then open up to events that will take place for Vincent in Dirge of Cerberus. Like I've said elsewhere, I doubt that Square Enix said, "Let's make a movie," and then when that went over well with fans mentioned Before Crisis and Dirge of Cerberus. I bet they had this going from the beginning. I'm sure the two sequels will connect in a way. That won't be so bad.