https://www.gamespot.com/articles/new-destiny-2-pvp-map-revealed-see-it-here-right-n/1100-6453924/

A new Destiny 2 PvP map is being added tomorrow, Bungie has announced. The new map "Distant Shore" will be available from October 10, timed with the start of Destiny 2's first Iron Banner, though it apparently won't be playable in all playlists until a week later.

Distant Shores will start to show up for everyone when Iron Banner ends, Bungie said. Iron Banner runs October 10-17, so players can expect to start seeing Distant Shore in the general multiplayer hopper on or around October 17, it seems.