So far, we don't really know what's going on with there at all. They're dropping hints but no solid fact. Also, if Sam is sleeping with Ruby like they imply, than this is a *way* different Sam than of previous seasons. At least, he didn't become that robot from Mystery Spot. Now, we just have to find out what he did become.

I also think Castiel is in for a bumpy ride as far as Dean's concerned. He's not going to roll over that easily. I think he kind of shocked Dean a little but it's not going to last. So far as Dean's concerned there's only one real higher power.