Another idea- how about a direct read from your latest DKS save? did you let loose Behrlin or did you side with Bellagar?
if you sided with Bellagar, then how about a quest to stop some errant explorer from freeing a now-thuroughly pissed Behrlin from joining the rank of the Black ring? If you sided with Behrlin, then how about a quest where Bellagar tries once again to off the Dragon Knight? [but is unaware that you killed Berhlin]