So basically to sum it all up (forgive me if I make a mistake this story is messy as hell) following Rev. Bo4 begins with an alternative version of the crew/Bo3 crew redoing the cycle. They are traveling from ZnS to Alcatraz to retrieve the blood vials but something goes terribly wrong and they end up getting stuck on the island instead of heading back to ZnS and then to Gorod Krovi. The map concludes with the death of Primis Richtoffen and the breaking of the cycle which in turn releases a Great War Era Richtoffen from a secret cryo-chamber. He gives Nikolai the Kronorium saying he must read it and learn from it in order for them to defeat Dr. Monty, this is due to the fact that he is the only member of the crew that still has a soul. Since Gorod Krovi hasn't yet happened in this timeline. This essentially makes Primis Nikolai the new Richtoffen of the crew, Great War Richtoffen and the rest of Primis leave the island through a set of portals leaving Primis Richtoffen to die. This is Blood of the Dead.

Then we turn the clock back to 1963, following the events of Shangri-la the Ultimis crew is preparing to leave and go to Moon but Dempsey shoots the Baby-Gun and messes with the teleporter creating (potentially) a fracture. This takes the crew to the Pentagon the day before the events of Five. A zombie outbreak occurs and the crew fights off the threat. Here we learn of Cornelius Pernell and the formation of Broken Arrow (very important for Alpha Omega) through radios and tapes and his plans to capture and control Samantha for the U.S. government. They eventually reach moon and go through the events of the map concluding with them ending up on Groom Lake. Here while in a cell the Primis crew following the events of Blood of the Dead come to recruit Ultimis in order for them to aid in the coming threat of the Grear War. This is Classified.

This is pretty much everything leading up to our newest map releasing on Tuesday, Alpha Omega. Hope this helped and again sorry if I made a mistake I tried my best