The YouTube Channel for Call of Duty released a new trailer of Salvation's zombies episode, called "Revelations." Treyarch seems to be going big with Revelations. Really big. Enjoy the reveal of Revelations's story, and it's big. Treyarch wants as much attention to this zombies episode that they went through the hoops to make sure you are intrigued from the get-go. Treyarch says they've been waiting to for this reveal for such a long, long time.