User blog comment:Argorrath/Treyarch posts a message of zombies; possibly hinting to a DLC 4/@comment-108.39.218.66-20130731041941/@comment-5081943-20130731051628

No, that would be way too close to Ghosts' release date (since PC and PS3 get the DLC 1 month after Xbox, buying the DLC on October then Ghosts a few weeks after would really be killing your budget).