Late ports won't sell. That's what western 3rd parties will judge.
This is why I've said in the past Nintendo had better pray somehow the launch is a success on the backs of Batman, ZombiU, AC3, Pikmin 3, etc. If leading the list is NSMBU, Wii Fit U, Nintendoland (if sold separately), the Rabbids game, Sing, and Lego City kiss any core western third party support goodbye.
Looking back I think see what my biggest issue with the E3 presentation was. They presented the Wii U as a system to get if you were a Wii only owner. Not someone that owned a Wii and another system. They didn't aim anything at the person that might have wanted a Wii U but as their sole next generation system for Nintendo games and 3rd party games. Perhaps they couldn't because there is no support at the moment.