Mario Maker needs to be the big Holiday release, and Nintendo should delay it until such to put as much time and effort into it as possible. I still say that if they play it right that game can capitalize on some of the massive kid fanbase of Minecraft, and possibly be a bigger seller than a Zelda game could ever be. 3D Zeldas have never been system sellers anyway, with the exception of perhaps OoT. So I don't know why so much emphasis was put on Zelda U as a system seller.
As for the more "core" fans, the return of Star Fox should be a great way to end the year if it can live up to expectations.