I think it will reach max 7 million. The thing about gears is that it does not have as much appeal as halo. Halo is an M rated game but come on it hardly has blood, language, gore, etc. Uncharted 2 probably had more blood than halo (well maybe in cutscenes). Gears, however, is built on the foundation of blood, chainsawing a body in half, etc. I think parents recognize that(even if they still buy them GTA) and will not bother buying gears.