https://www.gamespot.com/articles/destiny-2-warmind-dlcs-story-set-up-in-first-trail/1100-6458480/

Destiny 2's new Warmind DLC, which releases in May, again takes players to Mars. But this time around, they'll be playing in the new Hellas Basins area. It also features the introduction of a new Guardian, Ana Bray, who is set to play a central role in the expansion and is featured prominently in the prologue trailer.