https://www.pcgamer.com/battlefield-5s-battle-royale-mode-wont-be-live-until-spring-2019/

Electronic Arts said today that Battlefield 5's "Firestorm" battle royale mode won't be available until the spring of 2019, several months after the game is released. 

EA revealed the wait in an update that lays out Battlefield 5's "live service journey through the Second World War," which will begin in December with Overture. The first chapter in the game's Tides of War updates will feature a new tank-focused map called Panzerstorm, The Last Tiger single-player mission, and the addition of a practice range.