I believe that SSBB will be the year's best seller.
Look at the numbers:
Super Smash Bros. Melee sold roughly 1/3 the amount on a userbase that was roughly 1/6 that of the PS2+360.
Attach Rates:
GTA: San Andreas sold roughly 17 million (combined PS2 and Xbox), for about a 12% attach rate
SSBM sold roughly 6.5 million, for about a 30% attach rate
So even if GTA somehow gets 15%, a slight increase in attach rate, and SSBB drops down to 20%, a massive decrease, Brawl still wins.
Just using today's numbers:
19.45 million Wiis*0.2=3.89 million
Combined 360+PS3=24.73 million
24.73 million*0.15=3.7 million
The Wii will also slowly catch up to combined 360 and PS3 sales, and eventually pass them. The gap between the titles will slowly grow larger, though undoubtedly they will both still sell really well.








