User blog comment:Callofduty4/Black Ops II impressions on Zombies, new campaign level, and more!/@comment-3350690-20121013173615/@comment-222.252.101.97-20121014010411

Might end up as a cliffhanger, so that later they can add in new location/new Survival maps. With this, Zombie map packs would also work as story DLCs.