https://www.gamespot.com/articles/player-count-in-call-of-duty-black-ops-4s-battle-r/1100-6459037/

One of the biggest new features being introduced in Call of Duty: Black Ops 4 is Blackout, a battle royale-style game mode in which players compete to be the last one standing. Other battle royale games, particularly the two most popular examples of the genre, PUBG and Fortnite, support up to 100 players in a match, but Black Ops 4 developer Treyarch says it still hasn't settled on how many will be supported in Blackout.

Speaking to GameSpot, David Vonderhaar, studio design director at Treyarch, revealed that the developer is still experimenting with the player count for Blackout mode. "We haven't actually decided," Vonderhaar said. "We have to create the best experience, and to create that experience in a Call of Duty universe, you have to try various flavors of that until you find the right one."