Sammy Goes Dark Side (he wanted a cookie)

Who am I kidding, I'm the only one who reads this, so I'm gonna take the chance and post a huge spoiler for my story 'And the Ground Shook'.
'Hunted' spoke of the upcoming war, and that everything will be different after. It said that the psychics, the 'special kids' were going to be soldiers fighting for Hell.
And I was thinking, the other side's gotta have it's own soldiers, right?
And then - snap!
Dean.
Of course it would be Dean.
He's no saint, but he's all heart. He does what needs to be done. Fighting the supernatural is his destiny. AND now we have some sort of explanation as to why the YED didn't come for the firstborn. He was already spoken for.
Huh.