https://www.gamespot.com/articles/first-raid-lair-coming-in-destiny-2-curse-of-osiri/1100-6454978/

One of the big teases about Destiny 2's upcoming Curse of Osiris DLC expansion was that it would include new "Raid content." Bungie remained very vague about what this means, but during the first of three livestreams dedicated to the DLC, we learned exactly what's coming. And more than just being a component of the expansion, this has shown us what the future of Destiny 2 Raids looks like.