The movie Misha said not to watch. Karla.
I can't even begin to contemplate Cas' fate, where the show might go with him. I'm all nerves and nausea. I think that I agree, though, that the best scenario is some situation rendering Cas human. Maybe a big sacrifice, or a "back from the dead one last time, now don't fuck it up, because it's for real next time: you're mortal now". And recurring guest star is fine, because, honestly, that's what he's been as a regular cast member, RL baby or no. And it takes the pressure off of how to fit him into the story, and how to depower him so he isn't always the deux ex machina. And has endless potential story-wise.
And so, they'll just kill him. Maybe after he's been human for an hour.
Thank god I'm overwhelmed with work, or I'd be an insane mess.
Sam, Dean, love you, but you are SHOW, not worried so much 'bout you.