After announcing that Larian Studios wouldn't be making Baldur's Gate 3 DLC, an expansion, or Baldur's Gate 4, director Swen Vincke revealed that Larian had actually begun work on planned downloadable content before ultimately deciding to cancel it because the team's heart wasn't in it.
Idk, I think it would be cool if they made a completely separate, shorter campaign on the same engine for those who don't want to play through the whole campaign again, but still want to mess around in the engine. I think it would be really cool to have a few, small story DLC to hold people over until the next game releases.