User blog comment:Argorrath/Treyarch posts a message of zombies; possibly hinting to a DLC 4/@comment-6839281-20130806032815/@comment-5394014-20130806074632

Also noticed that. We might fight in the stock exchange. We might find out that Zombies prompted the wall street guys to panic and that they got mad, and decided to make everyone go bankrupt and crash everything down to 50%. Yeah.