Oh, absolutely. I think Smash will be #1 selling Wii U game once the console has finished it's lifespan. I think it'll be similar to GameCube's software rankings. Smash, then Kart, then 3D Mario, then the rest. Wii U is very much a core-gamer, franchise sequel machine, much like GameCube was. There aren't a lot of cross-over or casual games like the Wii had, and even if there were, the audience interest simply isn't there any more.
Releasing Smash before Black Friday for Wii U will sort of force the system into a lot of gamer's hands, because it's difficult to say no to a new Smash Bros. for console. They only come around once every console generation, and they're one of the best four player local co-op games around.