Lol.
2 weeks in:
NSMB:Wii - 3 million
Wii Sports - 2.36 million (understandable if that doesn't count though)
Modern Warfare 2 - 1.62 million (not inc. PC, but then as VGC doesn't trackPC I would guess it is notreally included in the OP anyway)
WiiSports Resort - 1.44 million
Wii Fit + 1.38 million
Assassin's Creed 2 - 1.28 million
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To be honest I think the third week of NSMBWii alone is going to be close in figures to the launch week of FFXIII. I think it should get about 1 million from America + Europe, and the Japan preview stated 470k, so about 1,450k - 1,500k for NSMBWii... wheras the preview has FFXIII at 1.35 million.
The following week will not be as large me-thinks.... but for December (5 week period ending 2nd/3rd of Jan) I think we should see this:
1. 6.0 million - NSMBWii
2. 3.6 million - Wii Sports Resort (which is not specifically in the poll)
3. 3.5 million - Modern Warfare 2
4. 3.4 million - Wii Fit +
5. 2.4 million - Assassin's Creed 2
6. 1.8 million - Final Fantasy XIII
Considering we are including multiplats, Mario & Sonic is advertised as a multiplat (I don't think I would count it as one, but some other sports games like Fifa are generally counted across all platforms even though handheld, Wii, and HD system games are very different... same for film tie-ins)
Anyhow, including Mario & Sonic would bump down FFXIII more so as it should manage 2.2-2.3 million for December (across Wii and DS)