SSBM was dramatically better than SSB.
Brawl is more or less as good as Melee, it did better partially because of the Wii larger install base, and partially because it was easy for Melee players to upgrade, since the Wii was cheap and likely they had already multiple GC controllers.
Smash Bros U will likely sell much less beacuse the console is more expansive and most importantly because SSB players will have to buy 4 brand new controllers to play it.







