User blog comment:Argorrath/Treyarch posts a message of zombies; possibly hinting to a DLC 4/@comment-174.54.216.36-20130802074740/@comment-174.228.200.148-20130803213751

The problem with PTG is that they the say 'oh, we knew this, we know this, just trust us, but we can't tell you.' That, and they make the story horribly complex.