Treyarch has recently posted up a new image on their FaceBook teasing things related to the Zombies series. This can be a hint to the next DLC, DLC 4.
The message reads to have been written on September 22, 1917.
Read the full message here:
- Edit: Treyarch has been releasing other things relating to zombies on FaceBook and be seen here:
- Edit 2: Treyarch has also released schematics of a Mauser which the designs are from Maxis and dated from January 5, 1915.
- Edit 3: Treyarch has now released an image of the periodic table, with Element 115 having the initials "Dv"