What makes a good comic book superhero movie?

X-Men, Superman, Spider-Man, Iron Man.

Excellent movies have been made about these characters, but what about the pitiful wastes of celluloid like adaptations of Catwoman and the Incredible Hulk? What makes a comic book superhero movie good or bad?

In the clickable pdfs at right, Professor Ehrlic Bertram Chandler explains his theory of how to make a good comic book superhero movie.