User blog comment:Argorrath/Treyarch releases a BO2 teaser video called "Origins" for DLC 4/@comment-5882782-20130808121724/@comment-5882782-20130808163041

I tend to get confused with the steps and what i have to do, i  just hope this 4th zombie map doesn't require you to do so much in one step in order to achieve the other step..Tranzit was my easiest followed by MoTD, Die Rise then Buried...really looking forward to the 4th one though, i hope there's at least one side quest that we can do which contributes towards the easter egg!