User blog comment:DevilWarrior112/Black Ops at GamesCom 2010/@comment-68.33.135.36-20100819130509

@DevilWarrior, Zombies was a last-minute edition though. This time, zombies has been from the beginning, especially if it's part of the co-op campaign. Being one of the new additions, I think it's safe to say that if the Co-op campaign contains zombies, it'll be shown.