The Call of Duty leakers' community has been calm of late, but that changed recently with some leakers indicating that a new 250 player map will potentially be added to Call of Duty: Warzone. The new map coming to Warzone is not news, but the fact that there are rumors suggesting a 250 player map is huge.
In the world of battle royale, well-known titles such as Fortnite have had many new maps and changes that have always kept players' interest levels high, but that is not the case in Warzone. While Warzone did have minor modifications to the original Verdansk map, there hasn't been a complete "overhaul" or new "main" map for the battle royale mode.
While Rebirth Island was a newly introduced map, it has its own leaderboards, and it is considered a separate game mode and not the principal battle royale mode the game is based around.
Originally, the new map was going to be introduced following a much-anticipated nuke event which is yet to be seen. But, given the recent changes to the Verdansk map, it is safe to assume that the nuke event or a new map introduction is just around the corner at this point.
These changes include the critical Outbreak event that added zombies, and zombie terminals that showed the contamination or zombie infection percentage across Verdansk. It is assumed that once the terminals reach 100%, Verdansk will be nuked to kill all the zombies followed by a transition into the new map. These terminals were found inside the new missile silos (all the more reason to believe the nuke event is nearing).