Mario Kart outsold NSMB on both Wii and 3DS, but this time 2D Mario has a nearly 4 million head start.

Which will win in sales, and why do you think so?

Mario Kart ez... its just more popular and appealing to a broader audience!!! And the graphics look so damn fap worthy

This is easy. MK8

(Thought it was vs SSB for some reason but I'll still go with MK).

MK8, I think it's a more accessible game than 2D Mario. You actually need to have some decent skill to play NSMB games, but MK8 can be great fun even for people with relatively low skill (though not no skill).

Mario Kart 8 is the best seller of console Nintendo.
Mario Kart sold 1/3 of console, if for me Wii U will sold 45,000,000, Mario Kart will sold 15,000,000... Mario Bros U i think 10,000,000.

This should be an easy win for Mario kart despite the head start NSMBU has but then if Nintendo does a bundle for christmas of Mario kart and NSMBU with the console then it gets more complicated.

At this point I'm not sure how large Mario Kart 8 is so unsure how easy it would be to include a download code with a wii u console but NSMBU is an easy download code pack in which obviously Nintendo prefers.

We don't know the review scores yet but it goes without saying that Mario kart 8 seems to be by far the best game on the wii u so far in visual beauty and new ideas. NSMBU is just a tidy up of a wii game. If Mario Kart 8 had been a launch game and bundled with the console the wii u probably wouldn't be in the mess it is now.

Mariokart 8 is likely to be the no.1 reason to own a wii u.

saw that you cloned my poll title :O
OT: mario kart 8

Mario Kart 8
Reason: multiplayer

The battle of bundles...

I'll pick Mario Kart 8, because Nintendo isn't being lazy this time unlike with NSMBU.

I think Mario Kart 8.

Mainly because I think it's going to be bundled this holiday, and I see it doing gangbusters over the holiday period (I mean crazy good, like 3 million).