EA Canada explained the following in a recent interview with Official Nintendo Magazine:

“In terms of game modes, controls, and gameplay we’ll actually have a lot of stuff [in the Wii version] that the other systems won’t.

“Since day one, we knew that we were taking FaceBreaker to the Wii. And we’ve learned that in order to be successful on the Wii, you have to create an experience that you can only get on this platform.”

“So we chose to build just about everything from scratch specifically for the Wii. No port here folks. And for what it’s worth, I believe that what FaceBreaker on the Wii lacks in super-duper, razzle-dazzle graphics, it more than makes up for by delivering a FaceBreakin’ good time for you and your friends that you can only get on the Wii.”

All very promising; good on ya EA.