Tadashi Sugiyama is apparently working on a Wii U title...
"Tadashi Sugiyama, an employee with Nintendo who has worked as a Director or Supervisor on projects such as F-Zero X, Luigi’s Mansion, Wind Waker, and Mario Kart: Double Dash, is supposedly working on a title for the Wii U that will be shown at E3 2012. The information comes “from a trusted source”, and considering the selection of title’s he’s been involved in, it will hopefully mean he has something interesting in the works."
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Furthermore, I think VGChartz should add a "Like"-button.