I don’t think he is wearing the trenchcoat, no. lowlyminion.tumblr.com/…
Well, the sleeve isn’t rolled up, it’s just pushed up to the elbow, so it wouldn’t stay that way, and there’s definitely that little strap-thing at the cuff. And with the way he’s bent over, I’m not sure that the coat would float out behind him.
But, we’ll see.
Benny makes more sense, plot wise. But I am having a hard time shaking the idea that it’s Cas. Particularly because it fits with what everyone has said about Purgatory having different effects on Dean and Cas.