Jaywood2010 on 26 March 2015
Possible. Halo 4 and Halo Reach sold 7 million their opening year.
Halo 4 - 7.1m
Halo Reach 7m
Halo 3 - 6.8m
So if Halo 5 has a similar opening as them then maybe if if Uncharted doesnt grow