Well, that was fast
Not even three months since Ninja Gaiden 3: Razor's Edge landed, we already have evidence that PS3 and 360 ports of the enhanced Wii U port are on the way.
Japanese retailer Rakuten has let slip that Razor's Edge will drop for PS3 and 360 on April 4, 2013. It will contain all the extra DLC characters and costumes from the Wii U build.
So, yeah. The situation is not much different than when Nintendo published Samurai Warriors 3, only for the game to later be ported to the PS3. Curiously the PS3 version never left Japan, but I don't doubt Ninja Gaiden will see worldwide release.