Metroid because:
- Wii U has already a great "racer" with mario Kart
- F zero has always being a niche game and won't succeed commercially, the game that still can sell Wii U is a 3D metroid.
EDIT: Retrospectively Retro really should have done a Metroid in 3D instead of a 2D Donkey Kong. T'was a big mistake notably in US where a Nintendo "first person shooter" is really needed.







