I have no doubt that GT5 will sell the most LTD. GT5 is the first GT in it's gen, it's been in development for so long, it has more content and features than ever, it's the best looking console game with the most content. And every main GT game sold over 10m safe. More likely around 13m is the average.
Halo 3 sold almost 11 mil, but it was hyped as the second comming of Christ, first Halo in the HD gen and the franchise wasn't beeing milked like it's now. No other Halo than the 3rd sold close to 10 mil, while GT games all sold over that mark.
SMG2 will not outsell the first one, the first SMG was a console selling, super innovative and original game, which sold a lot (8.6 mil) but nowhere near NSMBWii, which is in my eyes just above average game (almost double of SMG sales in 1/10 of it's time). So I can't see a reason, why SMG1.5 should sell more than the first (even though I wish it did, as SMG is the best Wii game bar none).
MY HYPE LIST: 1) Gran Turismo 5; 2) Civilization V; 3) Starcraft II; 4) The Last Guardian; 5) Metal Gear Solid: Rising
