I'm surprised at the lack of confidence in solid (albeit older) ports. If they scored well on other platforms already, I don't understand why they wouldn't score around the same on Wii U. Which is why my vote went for Mass Effect 3.
I'd like to vote for Zombie U,, but -- and perhaps this comes from my own lack of love for the survival horror genre -- I have a hard time believing that this will be the AAA game that it needs to be. I also might feel this way after getting burned by Red Steel for Wii.
I feel that NintendoLand, New SMB U, and Wonderful 101 will all score solidly in the mid to high 80s. But I think Wonderful 101 will be the only one to get scores in the 90s.