Naruto Shippuden: Ultimate Ninja Storm Revolution will have four new characters, revealed in the latest issue of Jump magazine. (Thanks, Re:Zaregoto)
Joining the roster of playable characters are the Second Tsuchikage, Third Raikage, Second Mizukage and Fourth Kazekage.
The game is in development for Xbox 360 and PlayStation 3. A western release is planned, but no date has been announced.