Back in 2009, Dean Winchester saw the future and it was grim.
The Croatoan virus had been released in 2012 and by 2014 the entire world had all but been destroyed. It's 2011. They were supposed to have another year, but they didn't get that lucky. Sam Winchester never said yes, never became Lucifer's vessel, and the future changed.
Now, they're living with the aftermath of that decision.
The apocalypse is now.
Rage against the DYING OF THE LIGHT.