Bobobo-bo Bo-bobo, Arale Norimaki (Dr. Slump, Arale-chan), Luckyman and Kusuo Saiki (Saiki Kusuo no Psi Nan) enter the game as playable characters, while Shouyou Hinata (Haikyuu!!) is a support character.
The game is due release in Japan on March 19 for the PlayStation 3 and PlayStation Vita; while the date is looming, there might still be more characters left to be unveiled.
(No, I don't know any of these new characters except for Arale-chan who is another brainchild of Akira Toriyama. And also, I think that Shaman King and Slam Dunk are yet to be represented in this game.)