So recently I had a chance to look at the Marvel Heroic Roleplaying Game. I only had time to skim through it quickly so I'm not going to say I completely understand how the combat works or I have all of the stat blocks memorized. It looks like it is a pretty good system for mimicking Super Hero comic books. The book is quite large (200+ pages) and contains a pretty good description of how the game works. It also includes a short adventure at the end.
Combat works with a token system. It uses the standard D20 set of dice but no twenty siders. Most rolls are checks against a fixed number but some are contested against an NPC's roll. What I find really interesting is the use of tokens. As combat goes on, you can spent your tokens to be able to roll extra dice (using the most favorable results). The neat part is that you can earn more tokens by doing cool but not optimal things with your turn.
I recall one session in Pathfinder where our Barbarian whips out his weapon and tried to do a dazzling display to intimidate the enemy. Everyone at the table got mad at him because rather than do the optimal thing (kill the bad guy) at best he would have given the bad guy a small penalty to his next attack roll. In Pathfinder there is no mechanical reason to do something cool. Why would you throw a chair at a bad guy when you can shoot him with your bow. Pathfinder (and D&D in general) is all about taking out the bad guys as efficiently as possible. Except by GM fiat, there are no rewards for cool. I think it's great that there's actually a game system out there that tries to reward the heroic and the cool even if its not the most optimal option.