Minsc and Boo can't feasibly still be alive 100 years later, that'd be insane. I'd be happier seeing some of the lesser heralded characters making reappearances. (Xan would fit right in...what better setting than Hell with a worm in your brain for a "we're all doomed?") Not sure how long halflings are supposed to live, but Mazzy Fenton is my favorite character of all, so I'm pulling for her. Somehow I know Drizzt and company will make another cameo, for continuity's sake.
Halflings lives about 250 years, so Mazzy could still be alive if she was under 100 in BG2.
Minsc and Boo had magical help, or unhelp depending how you look at it, to survive that long.
I'm not sure about a Drizzt cameo, he just got a baby girl with his wife.
