UPDATE: Famitsu confirms the PS360 versions are official:
In case there was any doubt surrounding this mornings Rakuten leak, Famitsu this week confirms Ninja Gaiden 3: Razors Edge is coming to PlayStation 3 and Xbox 360 on April 4 in Japan, making the jump to multiplatform from its former Wii U exclusivity.
The PlayStation 3 and Xbox 360 versions will have a new challenge called Ninja Trials, which will consist of 25 missions. New costumes are also being prepared. It will also include the Ayane, Momiji, and Kasumi playable characters released as free download content for the Wii U version.
Shouldn't really surprise anyone, but there you have it. The question is, does anyone even want it?