The Americas and Japan only, only current gen, no handhelds, no packed in Wii Sports and no Wii Play taken into account.
1. Super Mario Galaxy (Wii)
2. Mass Effect (360)
3. Call of Duty 4 (360)
4. Guitar Hero III (Wii)
5. Guitar Hero III (360)
6. Wii Fit (Wii)
7. Halo 3 (360)
8. Mario & Sonic at the Olympics (Wii)
9. Ratchet and Clank (PS3)
10. Wii Sports (on Japanese sales alone)
I don't have any doubt SMG will be the best selling game in that period. I think it will be the best selling game in the november/december period in Both the Americas and Japan and together the gap with number 2 will be huge.
I wouldn't be surprised if Guitar Hero Wii manages to outsell its 360 counterpart, although it will probably be close either way. Mass Effect and CoD4 I think will be the other 2 big titles for the 360 this holiday. Halo 3 will be further down simply because it will be released for 5 or 6 weeks already before the period we are counting even starts and sales will almost only come from new 360 owners.
Wii Fit will be big in Japan, and with holiday sales going through the roof I assume Wii Sports will also go up high enough to reach this top 10 on Japanese sales alone. Ratchet and Clank can make the top 10 because they appeal to both areas, as opposed to many other titles in the list.
Edit: Considering GH III's first week sales will not be a part of the period I made some adjustments to my top 10.
