I have a feeling that Toriyama will make this game. Serah found out that Snow married Lightning or Lumina before she turned into a villain.
Meh. I really doubt it because this game is the final chapter that will close Final Fantasy XIII's story.
And please don't tell me that Toriyama has secretly intended to plans omething like more sequel of FFXIII, whatever. C' mon. This is what Toriyama and his dev make this last game for everyone, including yourself. No more sequel. Just move on with new project of Final Fantasy game for PS3 or PS4 (still rumor).
"Get up!! Show me your true power!" Ryu's victory in SF3