Oh, I screwed up with GTA4... forgot the last week hasn't counted America's numbers yet.
In that case, the race between GTA4 and MKWii will be interesting... it's hard to say, but if we're cutting off at 12 months, GTA probably has a better shot. If we include the Xbox sales for GTA:SA though, I'm thinking it sold at least 1M extra in the first four months it had, and I doubt either game can beat 13M+.
So, at the very least, Mario Kart Wii will still be the fastest selling game on a single console.
@OkeyDokey: MKWii will blow past San Andreas for sure. San Andreas is essentially dead, while MKWii has the potential to take on Nintendogs - it's no contest. What would be interesting is if MKWii can overtake GTA's sales in Europe or America... is that possible?
