I'm a big fan of Baldur's Gate II, I've played through Baldur's Gate more than once, but I play Shadows of Amn every year or so, like re-reading a good book (even if I don't have time for a complete play-through).
I've finished a first run through of the EA, I had a good time and I'm intrigued by the beginnings of the plot but what I'm really curious about is how connected this game will be with the characters and events of the first two games, and I was keeping my eye out for it.
Priestess of Shar? Is there a Viconia connection there? Harpers helping druids stop a shadow legion? Is Harper and druid battle-ax Jaheria involved? Zhentarim? What happened there? I'm looking for connections where they don't exist I'm sure, but what isn't up for conjecture is the connection this game has with Descent into Avernus.
Though set 100 years after Throne of Bhaal, the 'canon' events of the Forgotten Realms seem to have had more impact on the story than anything, I don't follow these things, but I understand a Spell Plague seems to have rebooted things, I'm not a huge fan of the cosmology in D&D; particularly the heaven and hells angle is a little too...mundane (Devils that have hearts which pump blood, mundane), and I've heard mixed things about this module so I don't know exactly what to expect there, but I can get on board with a story, made better in the retelling.
I always assumed the original games existed within their own continuity with regards to the Forgotten Realms lore, I don't know how officially anything was treated but it's a question they must have answered before they decided to make another sequel; then again is this game part of a series or an anthology, I don't know.
I know Larian isn't about to give away the plot to the game but I am curious of the question of continuity has had any serious answer.
P.S. not that you asked but yes, I'd take Athkatla over Baldur's Gate, every time.