PlayerUnknown's Battlegrounds' War Mode, currently limited to custom games and custom servers, will be made into one of the game's new limited-time event modes at some point in the future.
Limited-time event mode was announced last month and PUBG's community coordinator Dan "RoboDanjal" announced that while war mode is in the "very early stages of development" on custom servers, they're looking to bring it to live servers as an event mode, but that it will "see changes between now and then".
Source : IGN.com
