I don't know why you call Halo 3 "the biggest game". It makes a lot of money in the front end because Microsoft has a rapid fanbase of a few million players. Due to the limitation of the Halo fanbase, and the relatively small install base of the 360, I doubt it will get to 10 million copies sold. I personally doubt it will pass 7 million.
18 million is likely a high prediction for Mario, I agree. But unlike many over-priced games on here, Mario is one of the few with the pedigree of sales to back it up (4 Mario platformer games have sold over 17 million copies) and it is coming out on the top selling system of this console generation. I think this game will probably outsell Halo 3 (it'll take a while to pass it though), but I think a prediction of 10-12 million isn't out of the question.
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I don't know why you call Halo 3 "the biggest game". It makes a lot of money in the front end because Microsoft has a rapid fanbase of a few million players. Due to the limitation of the Halo fanbase, and the relatively small install base of the 360, I doubt it will get to 10 million copies sold. I personally doubt it will pass 7 million.
18 million is likely a high prediction for Mario, I agree. But unlike many over-priced games on here, Mario is one of the few with the pedigree of sales to back it up (4 Mario platformer games have sold over 17 million copies) and it is coming out on the top selling system of this console generation.
I think this game will probably outsell Halo 3 (it'll take a while to pass it though), but I think a prediction of 10-12 million isn't out of the question.