Mario Kart 8 will be the worst-selling Mario Kart ever. UPDATE: Nope, my prediction was wrong.

[Wright]

PAOerfulone said:
At this point, it's safe to say that it'll also outsell Double Dash.
And if it's legs continue to last and be impressive for years even after NX launched, then it could outsell Super Mario Kart on SNES.

Hmmm, who knows. NX might pose a threat to WiiU software's legs.