It would even be cool to me if we met descendants of characters from the first two games. Maybe see the ripples through time of the Bhaalspawn's adventuring.
Yes it might be fun to meet Coran’s son, Krydle, who was introduced in the same comic books that brought statue Minsc to life and who adventured with Minsc for a while. I’m not sure how much of those comic books will be considered canon for BG3 but based on the final instalment Krydle and the rest of that gang could well be involved in whatever the Absolute cult are up to in Baldur’s Gate when we get there.