Wow, I can't believe it took me so long to come across this fic. I must have been living under a stone, because I'm sure this must have been rec'ed all over the place.
lyra_wing did an amazing job crossing over Supernatural with Neil Gaiman's American Gods, although you don't need to have read that book to enjoy this. It's a beautiful piece, and I found myself tearing up because if Supernatural had to end after season 2, this is exactly how I would have wanted it to end. Sam and Dean still fighting the good fight, saving people and hunting things, but with a twist. What are you waiting for, go read!
They are the gods of the open road and the hunt, of classic rock and stupid luck, of truck stops and greasy diners, of dollar beers and pool halls ... They stand for the underdog, the few and the brave who will fight for what they believe in, no matter what the odds.