heres my speculation on this topic, for one thing Brawl and Halo 3 are two entirely different games and do not need to be compared, but since it obviously is, i am going to give it to you straight, money wise Halo will completely dominate, a 360 game is usually 60 bucks and guess what? Halo 3s price was 60! so that means for every 5 copies Halo 3 sold Brawl will have to sell 6, thats not including the other two editions of halo 3, one costing 70 and the other edition costing like 100 (Sorry Halo fanboys, if i got the prices wrong), Even if you look at it from copies sold I dont think Brawl will surpass it, i read that on the release day Halo 3 sold enough to make more than the opening gross of Spiderman 3, which is one of the movies that made more money than any others in history, The only hope that brawl will sell more is if the Halo 3 fanboys have dried up their well and everyone who wants it has it. pretty much everyone in love with master chief has a 360, yet the wii (due to the holidays) is selling like hotcakes, Brawl could still win the battle if the wii outsells the 360 by a substantial amount, Brawl COULD do it, but over time, its not gunna happen right away.