User blog comment:Winchester7314/Possible Recuring S8 Purgatory Monsters/@comment-4011543-20120521062425

Vampires will definitely make a re-appearence, so probably Luther, Lenore, and maybe Gordon Walker.

Eve could appear and battle Dean in Purgatory, and then she clutches Dean and is dragged back to Earth when he does escape, so Season 8 could involve Eve back on Earth - the son of a bitch! - and trying to turn humanity into monster food again.

I can see Dick Roman also escaping, and resuming his plan to eat humans.

Madison might appear again, as an ally like she was before, since she wasn't pure evil. She could also help the Winchesters fight the Leviathans.

I bet the irony is that the Winchesters have to team up with monsters to kill the Leviathans; and then have to deal with Eve. Not all monsters like Eve, y'see.