@zackpr05 Tbf BOZ was finished the moment Sam & Peck's VAs left. Treyarch fucked themselves by implementing A.I. voice acting and ending careers of trained voice actors who essentially became the souls of their characters.
So previous theories still stand. If bo7 zombies takes place directly in the dark aether than most likely at the end of bo6 the Requiem crew bind their souls to the dark aether and their natural bodies die in Urzikstan.