The Supernatural Comic-Con panel may not be until Sunday, but the new footage from season 7 has already been released. We'll have more information after the panel, but until then check out the embedded trailer. Supernatural's 7th season begins on September 23rd.
“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.”