Here's a blog written by one of the editors of Blackwell Philosophy and Pop Culture series (including books such as Batman and Philosophy, Watchmen and Philosophy, and others). It features news, commentary, and reviews of current superhero comics, as well as insightful philosophical analyses. I've personally read the Batman and Philosophy book and learned a great deal about his deontological and utilitarian bents.
Here's a snip from a recent post about whether superheroes should take political positions
Why did this concern me so? Contrary to what Mr. Rucka says, I don't think defining a superhero as liberal or conservative would imply that he or she would help some people and not others in an emergency (though examples do exist, such as Ollie early in O'Neil's run), but making a hero's politics explicit does reduce the appeal of that character to a significant portion of the fanbase.Furthermore, it contributes to the perception that our political affiliations define us. If Superhero A is conservative and Superhero B is liberal, many people will take those facts to determine much more about their characters than seems appropriate. There's a lot of room for widely different types of liberals and conservatives in this world (not to mention all the people who reject both labels). And I like to believe that most liberals and conservatives (excluding the ones on the extreme fringe of each group) have more in common than not.
More at the blog.