Team Ninja has gone on record talking about the possibilities of Ninja Gaiden coming to the Wii.  It’s already coming to the DS, so why not the Wii?  Speaking at a recent Ninja Gaiden press event in London, Producer and Director, Yosuke Hayashi spoke about the possibility:

“We would make something for the Wii if we came up with something unique that would only work on the Wii. There are several groups within Team Ninja. The PS3 group, the Xbox 360 group, and there are Wii fans in Team Ninja.”

This seems like a pretty good possibility considering the support Tecmo is already giving Nintendo.