Well, this is a surprise -- it looks as though Australian studio Straight Right is being entrusted with porting Mass Effect 3 across to the Wii U.
The last game Straight Right worked on was Shift 2 Unleashed for iOS, a game which was released to great acclaim.
Straight Right announced the news on its Twitter and Facebook pages, and almost immediately after the announcement posted a pic of Mass Effect 3 running with the Wii U controller. It's great to see a local developer being entrusted with such an important launch title. We can't wait to see Straight Right's work on the project.