round about 3 months between each map pack so i make that about september if they were to release another dlc keeping black ops ever more alive
i'm almost positive there will be... back when the game came out there was a glitch to see the future DLC maps, and of them, 8 of them have been released, and there are 4 left. (cubetown, icebreakers, outskirts, and cargo) Also, if you complete the easter egg on call of the dead, you can hear an elephant make whatever noise elephants make, meaning the next zombie map is most likely in a jumgle climate. Kinda off topic but im curently looking through singleplayer and multiplayer for hints to the next map. (like a small paper in the mission u play as Reznov in the arctic, which has the VR11 on it)