1) Maybe we already got it? Minsc returning and being voiced by Mercer certainly got a lot of folks excited.
2) Some other big name character returning that isn't Minsc or Jaheria?
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)
4) Some mechanic they have been keeping under wraps this whole time. Seems unlikely to me, as one would think they'd be wanting to test it in EA for feedback.
5) Crossover with some other game, setting, novel etc. I know I'd be surprised if IDK we meet the nameless one in Avernus, fight One-of-Many as an optional boss working for Myrkul or bump into Liriel Baenre or something. There's a lot that Larian *could* do here. Mercer's involvement makes me wonder if there's going to be some CR stuff in the game, or alternatively some mtg-related stuff since WoTC did a tie-in with the game.
6) Something involving the Bhaalspawn. I'm sure Larian known that absolutely nobody loves Abdel Adrian, so I'm curious how they handle the Bhaalspawn in BG III.
