In what appeared to be a YouTube accident, but then confirmed by PlayStation Europe, Call of Duty Black Ops Cold War will feature a year long Zombie Onslaught mode only available on PS4 and PS5. This mode will consist of a duo horde style zombie fight where two players are teamed up and have to defend a slowly moving area from waves of zombies.
The now removed video mentioned allowing players to have classes, so we are unsure how equipment will be handled in this new mode. However, it does appear to use an "orb" or zone system like many battle royal games where the circle will periodically move and players not within the circle will start taking damage.
This is certainly an exciting mode for zombies, but it will not be available on Xbox or PC until November of 2021 and should be launching on release day for PS4 and PS5.