My answer? Possible.
Last December Wii was supply constrained and had a flat December, when typically December sales are double November, December sales were the same since there were no Wii's.
Even if Wii is down 50% for November (which I doubt with the price cut). December sales could be identical to last year's December, indicating it can come close to 2 million again.
If Wii wasn't supply constrained last year, I would not be surprised if it could have done 2.5-3 million 1 week worldwide.