superman should fight like a gladiator, he has strength and is invulnerable so he should not fight like a martial artist, but like a street fighter, like a combination between chuck liddell punching and kimbo slice brutality and chain punching... none of that choppy one single punch, but brutal rapid-fire chain punching sort of like donnie yen in this scene but without the martial arts skill of course but aggressive and animalistic
http://www.youtube.com/watch?v=nMuWmjye-LQ
and sort of like channing tatum fought in fighting