Just wondering who people think will be the big bad for Season 10?
The Grand Coven? They might be a little annoyed at Sam and Dean for killing one of their own.
Cain? He looked mighty happy to get his hands on the First Blade in the preview for next week.
Sam or Dean?
Metatron? Doubtful, he was the big bad last season.
Someone we haven't met yet?
Am I missing anyone?