I'm not overly enthused with this. Wii U NEEDS a true sprawling 3D Mario game. Mario Galaxy came one year after the Wii's launch. Mario Sunshine came out one year after the Gamecube's launch. Mario 64 came out one month after N64's launch. When is a legit 3D Mario going to Wii U? Two to three more years? Never? Nintendo is just shooting themselves in the feet.
With that said, I'd say my two favorite Mario games are Mario 2 and 3D Land, so I'll still buy and enjoy this game. It's just not what I want, nor what the Wii U needs. Overall it's disappointing.