User blog comment:Crazy sam10/Official Extinction teaser released/@comment-71.194.87.135-20131027182616/@comment-71.194.87.135-20131028234928

And people claim that black ops has something IW doesnt have: zombies. Zombies first came out in WAW, and people loved its Co-op. IW has a survival mode of its own, but with waves of humans. You could start a war with Spec ops over zombies, so IW thought of the new idea of aliens, which could beat zombies, we will have to see when the game comes out.