...include a survey for players at the start of the game asking them about some of the major choices they made in the first two BG games...
Maybe I'm wrong, but I suspect there aren't more than a few dozen players who would get anything out of this.
Those games were a long time ago. Plenty of people either never played them or completely forgot their major decisions. I doubt there are many players left who still feel connected to their old characters outside of some passing nostalgia.
I think the equivalent "previous choices" survey was quite popular in DAI, although I don't recall it making much difference while playing DAI. You could certainly do something similar in BG3 at a fairly low development cost, but I just don't think it likely that WotC would want anything that goes against the canon outcomes.
Kanisatha's suggestion of alluding to romance would be OK, because it doesn't really matter in terms of canon outcomes. For what it's worth, I do think there will eventually be a lot of links back to both the original games, and subsequent lore, but the links will likely be canon, rather than based on our previous choices.
Personally, that's fine with me, since the BG1/2 character is long gone, and was not one I had a particularly strong connection with.
