Whatever a possible DLC might be, it must be a nightmare to start a story from such widely different starting points. I mean your characters can be
dead/spirits/whatever, some weird new type of vampire lord, a spawn of said lord, Spawnstarion (in two variations ?), a newly minted god, his consort, the head of a Sharan monastery, the Chosen of Mystra, whatever a reformed Durge ends up being, along with all the more normal endings the characters can have.
It could be something like an invasion from avernus that needs defeated. I don't know all the endings but something like that should be something that would be in the best interest of all endings to beat. Maybe by going into avernus where you'd be able to do a karlach forge mission and bring her back to baldurs gate at the end of the dlc.
