Misha Collins will not be returning as a series regular next season.
SUPERNATURAL: Now, in season seven, the Winchesters will find themselves in an increasingly sinister, changing landscape, up against a new foe unlike anything they’ve ever fought. They’ll find their old tricks, weapons and hiding places all rendered useless. All they’ll have is each other. And the certainty that, like the last of the cowboy outlaws, whatever they face, they’re not going down without a fight.
WHAT DO YOU SUPERNATURAL FANS THINK?
i think is due to money thing like Mark did in season 5 that is why didn't see The Devil that much.