Done around 2009, this sword warrior from Marvel Comics, was started as an unused sketch, from the Moonsword Tolian pinup commission (in this gallery).
Later, I adapted it as Red Sonja, although I didn't know much about her character. It was only to do something different than the usual anime based art. The background was never fully finished. The only other American comic book character I've done fanart of, was Vampirella.