I don't think the western publishers will think it's worth their time. You could make the argument that Japanese devs need to support Nintendo (for their own good) than the western ones do. An unsuccessful Nintendo in the west doesn't affect their bottom line as much.
And I'm saying all this as a huge Nintendo fan. I wish western devs gave a crap about Wii U.
And despite all of that, it's still more likely than them porting their existing games to Wii U, which is why I bring this up at all.