This page will show you how to draw Ironman. Take a look at the face in the original image. The eyes are not quite lined up. When drawing the head in the preliminary stages, it helps to draw horizontal lines to represent the hairline, brow ridge, and bottom of the nose. These lines along with the bottom of the chin divide the head neatly into thirds vertically and are easy to remember as explained in how to draw a head and how to draw a face.
This is the redrawn image, and you can see that the face is much improved, with the eyes lining up nicely.