Gamerace on 02 January 2008
I don't think all Wii owners know about Brawl, in fact I'm 100% sure many don't since they never had a GC or N64 and don't pay attention to what's coming out, only what's currently available when they want a new game.
I also doubt it'll appeal to everyone. Seniors for example will not like the game.
Wii games also don't generally have the huge 1st day sales, but if any do this will be it, but I think your launch numbers may be too high.
As for legs, absolutely, as long as Wii is out on the market, SSBB will sell strongly. It'll likely never leave the top 50 and may be a regular in the top 20 for years. Without question it'll outsell it's previous versions and hitting 20 million is definately possible.
