User blog comment:Argorrath/Treyarch releases a BO2 teaser video called "Origins" for DLC 4/@comment-1639863-20130807222334

I'm going to start this comment by saying this is pure speculation.

But what if the map is a prequel that details the rise of the zombies. The American being Peter and the assumed German being Maxis. Honestly, I've got nothing about the other two, but it's a little theory.