User blog comment:Rafe Adler/"Let the Good Times Roll" Discussion/@comment-31057575-20180518082315/@comment-26982641-20180519171857

Well, Sam exorcised Samhain back so I doubt he'll return if someone won't break him out. Currently, Hell is full of normal demons besides him I guess. So there is no chance we'll see Samhain. I've always wanted to see Samael to make an appearance but I don't think they'll introduce such a character.

Rowena being the Queen of Hell is a terrible idea. A normal demon can assassinate her without difficulty. She is just a witch. Not to mention that she is now officially on the redemption path with Winchesters so that is very unlikely.