Bungie just published an update to the Development Roadmap, and included in the update is an announcement of the next Expansion Pack for Destiny 2 called Warmind, releasing on May 8. More details on Warmind will be revealed in a Twitch livestream on April 24.
Season Three marks the beginning of a new plan for how we deliver Crucible content. For every player of Destiny 2, we’ll be releasing all of the new Crucible Maps being developed for Warmind into matchmaking. The same goes for the maps we released with Curse of Osiris. To keep the community in the Crucible unified, everyone will see new arenas in matchmade playlists like Quickplay, Competitive, Trials of the Nine, Iron Banner, as well as the new weekly rotators that include Rumble and Mayhem. That means more opponents for everyone. With the arrival of Private Matches, players will need to purchase each Expansion to have exclusive access to play those Crucible maps with other players in a private match. This plan goes into effect on May 8 with the beginning of Season Three. – Bungie