Looks like this one was done in 2005. It's based on the published cover art by Dave Cockrum and Al Milgrom. It seemed like an odd request but it was fun. These things really should be signed with an "after..." or "based on..." line, crediting the original artist. This one wasn't -- an oversight on my part.
Atom and Hawkman #43 - Joe Kubert cover
39 minutes ago