Mario Kart typically sells 1/3rd the number of hardware units for the console it's on, so expecting WiiU to sell 25 million or so, I'm thinking.......

8 million Lifetime

FW - 650,000

2.2 million in 2014.

But you also have to count on those people being lazy enough not to return it after they discover the truth. After all their Wii Fit training, I'm not so sure.

550K Launch
3.9 Million 2014
9 Million LTD

I expect them to be too busy playing Candy Crush to even try putting MK8 in the Wii.

First week: 550,000
2014 sales: 3.25 million
Lifetime: 8 million

first week 425,000

2014.... 3,650,000

lifetime 7,500,000

690k first week
3m first year
10m LT

800 000 fw

4.5 mil fy

17 mil lt

I just wanted the highest prediction ITT

Whatever number the Wii U is going to sell in the end, Maroi Kart will have sold to ~30% of its userbase. Impossible to tell.

Leave  your first week and 2014 sales predictions as well and I will gladly put your predictions in the table!