hard to say. many will wait to read reviews because it's a new studio. if reviews will be positive/negative about things some don't really like, it could sell worse than expected. if they will have plenty of stuff many will like who weren't fans of reach, sales could be higher than expected. i have no clue how much advertisement microsoft will place all around america and europe. they will have a lot of that but as example i did never see advertisement on tv in germany, only for halo 3 if i'm correct and really only one time. if they start to advertise it more in countries like germany as well, sales could get a boost in these countries compared to previous halos. and i have no clue how much it will have sold until nextgen will release because of the smaller legs then.
i say 10 million.







