If the game is not really, really good they should just delay it.
Releasing underwhelming games like Animal Crossing Amiibo Festival, Mario Tennis, etc. is not helping the Wii U and its just creating a bad taste in the mouths of consumers.
If still sucks come September/October ... then it really just needs for Miyamoto to leave the project and be started from scratch for the NX, maybe salvaging whatever assets can be saved. Let someone younger take over the project and inject some new ideas into it, maybe one of the Splatoon guys.
A Star Fox game that comes out to poor/lukewarm reviews at this stage on the Wii U is likely to bomb anyway, which isn't good for the franchise.







