I expect it to do as well as SMG1...maybe a little less in terms of sales. The increased userbase will help, but it won't help bring sales up much. SMG1 had competition from Brawl, wii fit, and Mario Kart Wii so that might be for an advantage for SMG2. I dont believe NSMBWii will attract new gamers or pull that many away from buying this game. It is just a sequel too, so most of the people will buy it while others will overlook it. It is all based on the new buyers to pick this title up.
I still expect around 8 million sales, but im hoping it can break ten million.
Currently Playing: Mario Kart 7, Mario Kart 8, Luigi's Mansion: Dark Moon, The Legend of Zelda: Majora's Mask, Super Smash Bros for Wii U
Predictions:
Super Mario Galaxy will pass Super Mario 64 in total sales CORRECT!