So if this is shipped I'm going to guess around 1m for the first 4 days. Good numbers, Infamous took 9 days to sell 1m, of course Mario Kart is a much larger franchise. I'm looking forward to Media Create and NPD to see what effect this had on hardware.
And anyone expecting this to permanently raise the baseline for the WiiU is deluding themselves. Just like Titanfall it will provide a boost for a few weeks and then settle back into standard numbers until Smash Bros comes out.
Sigs are dumb. And so are you!