Have Superhero Movies Killed The Summer Movie Season?

It's the argument that quite literally some people are talking about: Are superhero movies responsible for the death of the high-quality summer blockbuster? You may be scratching your head, wondering when the last high-quality summer blockbuster wasn't a superhero movie. (First person to say Independence Day gets… » 6/04/08 6:30am 6/04/08 6:30am