https://www.polygon.com/2018/8/23/17773832/call-of-duty-wwii-shadow-war-dlc-release-date-ps4-share-xbox-one-pc

Call of Duty: WWII’s fourth and final DLC extension may be shared by owners with players who haven’t purchased it from Aug. 28 to Oct. 28, Sledgehammer Games and Activision announced today.

Called Shadow War, the expansion adds three new maps in Axis-controlled locales, another War Mode mission and the last chapter to the game’s Nazi Zombies arc, called “The Frozen Dawn.”