This was hidden in The CW’s press release for the upcoming Season and answers questions left open from Supernatural’s recent season finale. A very unusual move, wonder if it was intended?
SUPERNATURAL: Season six will be a season of mystery and shadow. Heaven and Hell have been left in complete disarray since the apocalyptic events of season five. And now, monsters, angels and demons roam across a lawless and chaotic landscape. And so Dean Winchester, who has retired from hunting and sworn never to return, finds himself being pulled back into his old life – pulled back by none other than Sam Winchester, who has escaped from Hell. The two reunite to beat back the rising tide of creatures and demon-spawn, but they quickly realize that neither are who they used to be, their relationship isn’t what it used to be, and that nothing is what it seems.