But that isn't the case for Halo 5. Ehh.. I really wish Microsoft would release something. I doubt Halo 5 only did 2 million WW first week (unless its digital sales were insane). I mean decline's happen, but pre-order's (according to VG-youknowhat yes, bad site, but hey) were at about 700k 3 weeks before release.
shit happens. some were soured over the last two releases, some were tired of halo, some moved on to ps4 and pc, some haven't upgraded yet, a lot of big games are releasing in the next two weeks etc...