I think that this post was sort of worded wrong. I think what he means is that black ops was a test for new things that people might like. Eg. the tighter maps like shangril-la and the bosses like George Romero, the moon man, the elemental guys on shangril-la, the monkeys that steal perks, the mad scientist on Five and so on. I think that they were tests for the next zombies, but I don't think there will be a zombies only game.