More and more i come to realize that my views of Ravenloft are tottally different from the most acceptable view...
The S metaplot in my eyes is a search from Azalin from two things:
1 - The "good" powers - since i remember lord of necropolis when he meet them and they said that the work in stoping the dark powers isn't theirs, but the ones who the dark powers "trust".
2 - If there is a true incarnation or spirit of his son Irik, again in Lord of Necropolis he discovers that the spirit that haunt's him wasn't the true spirit of his son... since he had left, and his trails go to the mist.
I don't believe that Azalin wanted the old 2nd edition goal: escape. He want's to punish and destroy the dark powers (again lord of necropolis).
Other thing is: Azalin already knows how to escape the demiplane, but also knows there are two ways to do it:
1 - Like Soth, rejoining old sins and seeing the truth that he was the wrong (Spectre of Black Rose : once magda lifted the curse and the white rose came to bring him back to where he truly should be, and War of Souls Trilogy book 3: "I saw in the deepest darkness her face" - in my view Margareth Weis made soth ravenloft adventure cannon with the his death passage - even if she don't wanted it).
2 - Like Vecna (i don't know how he made it - i never found to sell the adventure in a bookstore here in Brazil).
The result is obvious: one way only escape (with the dread possibilitie to return like Soth), the other is escaping and destroying the domain (Caviticus don't exists if Vecna escaped), and he wants the second way, which he don't know fully how to do.
So nothing to do with hykosas tribe, gentleman caller, isolde etc, since they aren't part of Azalins history.
Of Course, this vision is based in a "romantic style" where a darklord can only be truly defeated if he faces old sins and sees that he was wrong (sort of salvation), destroying with him his entire domain.
PS: I don't own all stuff about Ravenloft (mainly the Black and RED BOX, 4 novels, 5gazzetters, the netbooks

, RPHB, RDMG, RDoDarkness, Dark Tales, Van Richtem Arsenal, legacies of blood and Guide to the Mist

)