I think Destiny will sell more than any of the CoD's, that is of coarse because it has 10 years to do so. (people will be buy the core game with any expansions in the future, think WoW, people still buy vanilla to play expansion 4-
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut