There needs to be a new F-ZERO game.. and it needs to be GX, but More!
Same Physics, Same Cars, put the old Tracks in a series of "Old Cups" (Hell, add some FZX tracks, too... And some 3D-remakes of the FZERO SNES tracks), Same mind-bending, finger punishing difficulty.
But add:
New Cars
New Tracks
New "Story Mode". (But keep it the same concept)
More stuff for the Car customization.
Better Graphics (GX's were great, but with the Wii U they can do better!)
Online Play
New Music (Keep a lot of the old, add a few new songs)
Possibly add:
Custom Track Creation
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You rage, you lose.