well when blue dragon came out it sold 83k and 360 sold 37k units
hell the 2nd week of blue dragon moved 18k units
star ocen 4 with 164k units moved 25k 360's
i say 12k is possible without MHF. MHF could move up to 20k units by its self so if 360 were to sell 32k units id belive that.
Halo MCC will sell 5+ million copies(including digital)
halo 5 will sell 10 million copies(including digital)
x1 will pass ps4 in USA, and UK.