Tadashi Sugiyama is an employee at Nintendo and has been involved in games like Mario Kart: Double Dash and F-Zero X, but there is a rumor that he is working on a Wii U game right now and this title will be shown off at E3 2012. This is just a rumor for now since we don’t have a confirmation or anything, but maybe he is working on a F-Zero game for the Wii U. We will have to wait until E3 2012 and see if a F-Zero game pops up.
Source: wiiublog.com