User blog comment:Argorrath/Treyarch posts a message of zombies; possibly hinting to a DLC 4/@comment-66.230.84.30-20130731192955

The WW 1 setting sounds pretty cool. You could use era specific guns, and the wonder weapon could shoot poison gas or something. As for the story, it could be four German officers trying to get to Element 115 before Ricthofen. But someone else has discovered it...