I want it to, but it won't. It's not like MK7 is even done selling.

No I don't think it will.The user base for the Wii U is too small compare to the Wii.

This gotta be the worst prediction of the year

I blame vgc for the continued threads like this. If they updated the numbers last week then people would be less cocky I believe

Did MK7 also came with a free downloadable game so that the fist week sales are even comparable?

Yes. it might take a while, though.

It needs a miracle for that to happen!
Mario Kart 8 will sell really well, but it wont be enough at the end.

Yes, and Infamous Second son sold more of XBOX ONE...

Or you could look at MK sales as a proportion of install base.

MK Wii ~34%
MK DS ~ 15%
MK 7 ~22% (will probably fall over time but right now it's still selling at about 25%)
MK Double Dash ~31%

So let's be generous and say long term MK 8 will sell to 38% of Wii U owners. To outsell the current MK7 sales Wii U needs an install base of 25 million. And that is if MK 7 stops selling right now. Even if attach rate is 40% it still means Wii U needs to have an install base of nearly 24 million just to reach MK 7s current sales.

Seems rather unlikely given MK 7 will probably keep selling several thousand per week for as long as 3DS is selling. So MK 7 will probably climb towards 11 million over time.

I think over time it could, just based on the fact that it's a far superior game. It built up a LOT of hype, whereas MK7 was mostly just business as usual, outside of the flying/underwater bits.