It's nice to be bold, but I'll stick with an obvious trend.
Halo might have reached its peak with Halo 2, so let's say the total lifetime sales of Halo 3 end up at about 8.50 million for a total userbase gain of 220k.
In order for Brawl to beat that, it would have to increase to possibly 8.6 million, or a total userbase increase of 2 million.
The Halo series has always had great legs in America. Now, Melee and Halo 1 came out at approximately the same time, and Melee beat it by about 150k lifetime, whereas Halo 2, with online capabilities, beat Melee by 1.76 million.
Brawl might have had the chance had it launched at Christmas, but because it launches in 08, its chances to have a strong launch and catch up are now a bit low, especially since many high profiles titles are launching in early 2008.
