dean, what have you done?
Admit it, you just thought of your OTP.
What do you mean it’s not my OTP?
The OTP test: Which ever pairing comes to mind first… yup, that’s your OTP.
Seriously though, when Metatron said that Castiel was the villain and that he was the hero, it reminded me of Sylar saying a very similar line to Peter in How to Stop an Exploding Man.