Black ops 2 probably sold that little bit less due to the insight of the futuristic background to it, people preferred Black ops 1 and world at war gameplay due to the weapons not having to made OP due to the futuristic theme. Some guns look like they came from Sci Fi games. (That ain't including the ray gun and wonder weapons on zombies but half the weapons look simply unreal which further makes Black ops 2 unsuccessful.
i agree with the community but in other words tryarch should add all the maps from World at war to black ops three with the dlc's for zombies was awesom. Lets face it ORIGINS was the best zombies map. Reply if agree i hope u guys spread this post for tryach to accept the communitys opinon.