I don't think one game is enough to save the Switch, but maybe this will get enough systems out there to get the ball rolling. I'm sure some people will pick up the Wii U version if they already have one, but I can't imagine buying a console that has been basically declared dead for one game now.

EDIT: I'm saying the Wii U is dead, not the switch. IIRC production has stopped, and there are few games still coming to it.

EDIT: I should be more clear. "Save the switch" isn't the right way to say it since, as other are pointing at, it hasn't launched yet. It's difficult to make a successful console, it's sort of a chicken and egg problem, you need to have successful games to attract more successful games. The Wii U had some hits, but they were too few and too late. Coming out of the gate with this is great for Nintendo.