I think ZombiU was a great start for unique and quality gameplay, however I admit is still has a limited audience as its hard and lonely.
Mario is a good 2nd, but there really needs to be a game that hits home.
Something that is a mass market game like Wii Sports was (nintendoland could be this but it fails to impress on videos alone) and/or a strong "next-gen" title that pushes the core to desire it. Unfortunately in its launch, this is next to impossible to achieve being the first out the gate.