Preliminary VGChartz estimates are in and it looks like New Super Mario Bros Wii has become the third fastest-selling game of the year so far in the Americas with over half a million copies sold in the first day alone. The title had accumulated around 520,000 preorders as of last week and VGChartz estimates that week one sales in the Americas should come in at around one million units.
The top Wii openings in the Americas have been Super Smash Bros. Brawl which sold 1.59m units in week one, and Mario Kart Wii which sold 1.21m units in week one. New Super Mario Bros Wii is expected to start slightly below those two but should sell more in weeks 2-6 with holiday sales boosts (Super Mario Galaxy may be a better comparison as it came out at roughly the same time of year two years ago although New Super Mario Bros Wii is expected to track at least 50% higher in the coming weeks).
With Assassin's Creed 2 and Left 4 Dead 2 out tomorrow and Modern Warfare 2 still seeing enormous sales, it will be a busy week but at the moment it looks like Mario will be coming out on top.