An online advertisment, which has since been pulled, which was displayed on the Australian video game retailer GAME, has revealed some details on the upcoming Call of Duty: Black Ops "Escalation" DLC.
According to the advertisement, the Escalation map pack will be released on May 3. The map pack will apparently contain four multiplayer maps: Zoo, Convoy, Hotel, Stockpile and a zombie map dubbed "Call of the Dead."
The promotional image also states that the map pack will be released first on Xbox LIVE, as the previous "First Strike" map pack before it did.
The DLC has not been formally announced by either Activision or Treyarch.