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.
They’re been working on BG3 for so long as a studio… I can imagine wanting to work on something else.
Here’s hoping for a Games Workshop based RPG, maybe a Warhammer Old World story.