https://www.gamespot.com/articles/new-destiny-2-roadmap-reveals-a-year-of-dlc-after-/1100-6461447/

Forsaken, the next expansion for Destiny 2, arrives on September 4. Bungie has revealed the planned roadmap of DLC content that will come to Destiny 2 after Forsaken has run its course. There are two different paths of content depending on whether you want to spend more money on Destiny 2.

Forsaken kicks off Destiny 2's fall season, which runs from September through November and is called Season of the Outlaw. On September 1, you can play Gambit as part of a 24-hour trial if you pre-order Forsaken. Forsaken officially launches three days later, and the expansion's raid, titled Last Wish, goes live on September 14. On September 18, Iron Banner returns and The Convergence map is added to the Crucible. The Breakthrough multiplayer mode comes to Crucible on September 25, along with some more maps. Festival of the Lost returns in October, but Bungie is promising a twist this time around. Continued updates and surprises will be patched into Destiny 2 throughout November.