User blog comment:KATANAGOD/Treyarch Teases Zombies (again!) on twitter - In-game Screenshots this time around/@comment-4122733-20120922075545

Well if its on a farm, it probably means that the 4 original characters have landed back on Earth, there's some sort of Zombie apocalypse happening and they bump into 4 farmers who can actually shoot AR's and LMG's very accuratley at Zombie head's. Looks good.