User blog comment:Tommy,Klaus&Kol2012+/Why I think the Behemoth, Ziz and possibly this Chaos will be the next "big bads"/My plan for S8/@comment-5123006-20120701160041

I don't know, Behemoth and Ziz seem like too much of a rehash of the Leviathan storyline and the writers probably wouldn't do that. Maybe Chaos, Kronus, or some of the other gods were imprisoned in Purgatory as punishment(I've read stories before where rebellious gods, especially Kronus(father of the Titans) are imprisoned with monsters, which in the Supernaturalverse would mean imprisoned in Purgatory). That would allow the writers to stick to their plan of having Chaos/Nature as villains while tying into Dean's trapped in Purgatory storyline.