https://wccftech.com/call-of-duty-black-ops-4-content-shift/

Recent reports suggest a change in how Call of Duty Black Ops 4 multiplayer and Zombies content is being delivered.

Website Gaming INTEL reports having heard that Treyarch will be ditching the traditional overall season pass model with new content and maps, for a model that allegedly introduces new free multiplayer maps every couple of months and a season pass for the game’s Zombies mode.