Blizzard announced the opening of four new realms today so that players may start fresh adventures in Azeroth! These new realms will be incorporated into Battlegroup 11. You can find Battlegroup listings here:
https://www.worldofwarcraft.com/pvp/battlegrounds/battlegroups.html

Echo Isles PVE
Blackwater Raiders RP
Vashj PVP
Darrowmere PVP