LOVE the background. Fantastic job on the sky. I was a little distracted by the trapezius and neck muscles. They seem a bit out of proportion to the rest of DD. Just, IMO. But I really like the work. It is dark and gritty - just like the character represented here.
Nice use of clouds to make the fog effect. Great work with the colors depth. Working in all red always gives me a headache. It's soft, but not over powering. You know. Making him look like a moving target.
The proportioning on this right arm looks funky. The forearm looks short and thin compared to the rest of him.