User blog comment:Argorrath/Treyarch posts a message of zombies; possibly hinting to a DLC 4/@comment-213.107.179.220-20130801100329/@comment-3472415-20130802221339

MotD wasn't the result of experiments. MotD is sort of like a purgatory or hell for the mobsters sent there after their deaths. MotD really has no connection with the rest of the Zombies story.