There's a little bit at the following link, including "Watch the full story on "SuperHumans!" a special edition of "20/20" Tuesday, June 1 at 10 p.m. ET"
Superhero Obsession: Why We Love Fantasy
From Jesus to Hercules to Superman and Iron Man, All Cultures Have Own Mythic Heroes
By JON MEYERSOHN
May 31, 2010