What about The Darkness, anyway?
Given the name, we can be sure The Darkness, introduced in Supernatural Season 10 Episode 23 as the upcoming big bad, will be nothing but terrible news for the brothers Winchester. Seriously, is that any surprise?
Now you can take it from the lips of Executive Producer Jeremy Carver. What does he have to say? First of all, a very kind thanks for watching and then, exactly what we expect: "For the boys, things are going to go from bad to worse," when Supernatural Season 11 commences.
Will one or both be in hell, strapped with a Mark of whosywhatsit or otherwise in peril? Hell yeah. And we wouldn't have it any other way. That's why it's been going strong for over ten seasons.