Update: According to the Famitsu article, the concept behind the game is "zombie", "action", "ninja", and "mecha". The game is supposed to be a "new type of Inafune zombie game."
More details should become available when the game's official site launches tomorrow. There's talk online in Japan that this game could be a Wii U title. Have a blurry look at the game's first concept art and its logo.