*Spoilers-You've been warned.*
The angels have fallen. There's a power vacuum in hell. Monsters still roam the Earth. Sam's got an Angel in him. The Prophet is beating up Crowley, and Dean? He keeps on keeping on. After the Winchesters (with a little help from their sex-obsessed friend, God) defeated Lucifer, I genuinely wondered where the show could go. I've been fairly pleased with everything they've done.
The CW's Supernatural does a fantastic job of creating a contemporary mythology. I can imagine anthropology students centuries from now trying to understand our culture from this show. We see in the Winchester's constant battles an echo of our culture's inability to reconcile the needs of the human animal, the traditions that have shaped our culture, and the problems posed by a culture of accelerating change.
The scene in season 9 episode 2, "The Devil May Care" where Dean and Ezekiel, renamed Zeke, talk after the angel has laid waste to a few demons to protect Sam's body which he occupies, the contemporary state of the traditional man trying to be good yet unable to trust even an angel, and the angel recognizes the legitimacy of Dean's dilemma. The problem is no longer one of faith, but rather of how to trust when one is presented with an over-abundance of evidence. These sorts of theological and metaphysical problems get reduced to emotionally overwrought melodramatic moments pleasantly punctuated by beautiful women and engaging battles.
Supernatural is a damn good forty minute distraction filled with fantastic interpretive moments anytime the viewer feels like treating these supernatural creatures as metaphors or representations of traditions.