Baldur's Gate 3 can't stop here. After this episode, at least we need one great expansion if not two until 20th level, like in Neverwinter Nights 2, and then the great next step, Baldur's Gate MMORPG, the RPG online community awaits from decade a stunning MMORPG based on D&D, and this may be the right time. All the settings have been already written, not only the Forgotten Realms, all ones by Wizard of the Coast, the adventures, the PNG, the story, cities and so on.
Larian, do like Freddie Mercury: DON'T STOP ME NOW.
I don't think there will be any such expansion and for the moment there seems to be no plan or intent to go to higher levels. And given how the story is set up with the BBEG gang all together with a heavy dose of illithids thrown in as well for a final showdown I don't think there will be more chapters to this story...this is very likely the end of the line for dead three. If there will be more Baldur's Gate games they will not be related to this trilogy and not called BG4. So in terms of leveling and advancements this is likely it...12 will likely be the max. But the game does offer far more magical items and far more powerful ones than any DM would dare hand a player at that. So the power curb of a maximized level 12 BG3 character will probably be well beyond that of a level 12 5e character at a table in the tabletop D&D version.
