There isn't all that much known about this new Dissidia game, besides a strange and unnecessarily complicated title. A few characters have been released and a couple nice screenshots of gameplay. It seems the core gameplay that was seen in Dissidia remains intact, which in my opinion is excellent news. According to Joystiq, Dissidia Duodecim will have Tifa, Lightning, and Kain so far as playable characters. As well as some "RPG mode" and a playable Chaos storyline. Sounds like we'll see complete storylines for all the villains this time.