If anyone is gonna crow to Sam about Zeke, it's Crowley. He's gonna love it.

Zeke creeps me out. Not just who he might be, but how he takes over Sam in an instant. That bit where he just starts talking in mid-sentence, taking over from Sam when Dean's asking him to take it easy - holy fuck!

and might even refuse to leave Sam's vessel, forcing him to remain unconscious.

I can see it happening. I wonder if there is some kind of angel exorcism to force an angel out from the outside?