Call of Duty: Black Ops II still has nearly twelve million monthly active users, according to Activision's latest financial report.
The three-year-old game actually increased its player base this quarter by approximately a million players.
Activision's decision to make a version of the upcoming Black Ops III for previous-gen consoles makes sense in the light of such numbers, likely driven by anticipation for the new shooter.
Additionally, Ubisoft reported in its quarterly earnings call that for the first half of fiscal 2015, 31% of its sales were on previous-generation consoles.
As previously reported, Black Ops III will not feature a campaign mode on previous-gen consoles, and will run at a fluctuating frame rate between 30 and 60fps.
Nevertheless, Call of Duty: Black Ops III will likely sell millions of copies when it launches November 6th on new-gen and previous-gen consoles and PC.