User blog comment:FromDvToZombies/REVELATIONS Easter Egg Cut-scene achieved! PRIMIS revealed!/@comment-1187559-20160915173819

I reckon they tried to end it with a time travel loop. Now the 4 are back at the beginning of the whole ordeal when the knights first fought off the Zombies in Paris. Allowing events to unfold the same way.

It's what I got out of it anyway. I'm certain they'll find a way to reboot it for the next 3arc CoD game.