How do you explain the Halo 5 drop then? Going from 3m+ in a month to a bit over 1m is huge. Plus, Halo didn't do as well on XB as it did on 360.On the XB, it was basically a new IP.
I don't expect Gears to drop as much but it will drop quite a bit.
I blame it on Halo 4 being fairly divisive, and MCC having early troubles.