I mean, I'd love to see an expansion to BG3 that adds level 12-15 or so and the content to match, don't get me wrong- but it would be quite a thing to try to make it work with the sheer variety of different states things can be in at the end of the game. It's not impossible, but trying to account for all of the possibilites of the game's ending would be enough to drive me a little crazy, anyway. I mean, you'd have to have a story that would draw in Shadowheart no matter what happened with Shar, account for Astarion maybe not being able to go out in the sun anymore, account for Karlach maybe being dead or a mind flayer, the very real possibility that gale is a god now, etc etc.
I think if we do get an expansion or significant DLC, it's more likely to be stuff that happens before the endgame- basically add new content and push the existing level of end-game stuff up a few levels to account for it, that sort of thing- just because it would be much less of a mess to account for all of the characters and how their stories ended in the base game. We'll have to wait and see, though. I'll be happy to get more content however it happens, assuming it maintains the base game's level of quality.
