Call of Duty: Vanguard will have a Zombies mode, made by Treyarch - Polygon

Call of Duty: Vanguard will get a Zombies mode developed directly by Treyarch, despite not being a Treyarch game. The Black Ops Cold War developer will pitch in for Sledgehammer’s entry in the series by creating new Zombies content for Vanguard.

Call of Duty Zombies peaked in Black Ops 3 and won't be as good again

Treyarch will develop the Zombies Mode for Call of Duty: Vanguard

Call of Duty: Vanguard - Wikipedia

CoD Vanguard devs say there are “big plans” for Zombies future - Dexerto

New Call of Duty zombies could be coming, but not for Modern Warfare 2

Call of Duty: Warzone 2.0 - Wikipedia

EVERY Treyarch Zombies Map Ranked! – SeppinRek

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Call of Duty: Vanguard Zombies is being developed by Treyarch

Treyarch to develop Call of Duty Zombies in CoD: Vanguard - Dexerto

Your Gameplay Guide to Vanguard Zombies - Treyarch

Call of Duty: Vanguard review - fun filler that won't live long in the memory