Think Soth, iirc, repented of his evil and was redeemed, thus leaving Ravenloft?
Like Dark Sun, rather they ignored much of the later stuff and stuck to original, as the later stuff just made it messy as hell :/
Soth was taken out of Ravenloft around 1999 in Spectre of the Black Rose, not because he had been redeemed, but because he somehow managed to ameliorate his torturous existence in Ravenloft. Although never expressly stated, it was hinted at that the Dark Powers realized that Soth could not suffer any more and just got rid of him.
Back in the late 90's/early 2000, rumors were flying that Soth was taken out of Ravenloft and back into Dragonlance because he was supposed to be the big villain in 3E Dragonlance. That was back when Wizards of the Coast were planning on doing Greyhawk as core and Forgotten Realms and Dragonlance as their two campaign settings.