Going by VGChartz sales (who are known to give 3DS more sales than reality tells us) will CALL OF DUTY BLACK OPS 2 outsell 3DS life-to-date sales by Jan. 1st globally?
Hints:
3DS userbase right now: ~19.7m
3DS sales for the last 4 months of 2011: ~8.6m
Sales of CoD's previous installment (Call of Duty: MW3) by Jan 1st 2012 (excluding PC digital sales): ~24.4m