Beautifully painted, I like the monotone background and how ultimately the red wash disappears as we get closer to Captain America thereby making him the first read in this fine illustration. I also admire your sense of framing and composition. Making the Red Skull slightly off kilter or imbalanced in that hes not standing up straight but at a slight angle really works to amplify hes a villain in the composition and the framing works beautifully as you give us objects in the extreme foreground that immerse the viewer and makes us feel like we are observing this. The background behind the Red Skull also give us a sense of scale and works well to ground him in the environment. Again, beautiful work.
I have a tutorials section in my gallery, though it's pretty empty right now. I draw/paint live on the internet occasionally. I usually send out broadcast notifications on Twitter, and sometimes here via my journal.