User blog:NaiflidG/Discussion on Cain (possible spoilers)

I hope that this demonic Cain is the same Cain that Michael already established in TSRtS as part of the bloodline for vessels containing him and Lucifer. It would give the writers the opportunity to really flesh out his backstory as well as that of other characters.

It'd certainly be interesting to see him interact with his descendents, Sam and Dean. It'd also be ironic if the two Cains were the same, since that would mean that his student Abaddon personally killed another one of his human descendents (Henry) and arguably influenced much of his family's history (e.g. that might have been what made John relocate to Lawrence, meet and marry Mary, have Sam and Dean, turn the Winchesters into a hunting family, etc.) because that one act kicked it all off. Even if my theory turns out to be wrong, I also really want to see him interact with Abaddon and for her to be outraged by what he has become, by his "retiring," for "loving," for standing by and letting Crowley to run Hell into the ground.

I'm thinking that Cain may have served as either Michael or Lucifer's vessel when Michael fought and imprisoned Lucifer; probably Michael because Cain was the older brother (like Michael, like Dean) and killed his younger brother (which the show could interpret as him defeating Lucifer in the form of Abel), but Lucifer might fit better due to the hell-ish connections and it could explain why Cain got turned into a demon--if he gave consent to Lucifer, then Lucifer had access to his soul and could turn it into a demon.

Cain looks like an interesting character and I'm really jazzed to see what's going to happen with him and Abaddon and the Winchesters, but I'm also a little wary because the spoilers released about the character--he's supposed to be a demon who retired because of love? What? What do you guys hope will happen with Cain? Any theories?