I think it is something plot-related. I can imagine that it could be something like this:
3) BG III is kicking off some big status quo changing event for the realms. Could happen. WoTC has done it before. (Time of Troubles, Spellplague, etc)
I must admit that I am very excited about the full release. The plot seems to involve a lot of parties already: we've got the Absolute, the Dead Three, Shar and her followers, Mindflayers, the hells, the Githyanki, and maybe Selune and Mystra ... (and I am sure I still might have forgotten someone). And there is of course our artefact, whatever it is, and the Netherese magic that might have changed our tadpoles.
Quite a few characters seem to be connected to one of these, in one way or another, including our companions (or at least I think so):
Shadowheart: Shar - and maybe Selune as well -, and of course the artefact
Gale: Netherese Magic and Mystra, quite intimately...
Wyll: the hells, via Mizora (I don't think she is just any random cambion, I would not be surprised if her father turns out to be someone a bit more important/powerful)
Astarion: the hells (his scars are infernal glyphs, maybe some sort of contract Cazador concluded with someone in one of the nine hells?)
Lae'zel: Githyanki, and also connected to the artefact
I wonder how our Tav fits into this.
Personally, I'd prefer if we were just accidentally dragged into this mess 😄
For me, it would be more fun if my player character is not the "chosen one", but just a regular person who is trying to make the best of all of this. I think "becoming special" is more interesting for a player character than being "destined to be special". And it allows for more player agency.
I am
very curious how everything will fall into place.
But August is not that far away.