One quick thing about 10x01

Dean is a big enough Loki fan to quote Loki at 2013 comic-con. More obvious Avenger choices would maybe be Tony, or Natasha or Phil - but no, Loki. Less Dean's usual style.
And he isn't quoting the movies, it's a fandom quote.


Dean must be on Tumblr.

I say at some point Sam must have walked in on Dean practicing this monologue while shaving.


Part of Dean and Crowley's misadventures must have included going to the 2014 comic-con.

ETA (on a different note):
Gorgeous Thor and Loki as Dean and Sam by Wantstobelieve