I learned about a book today titled 'Science of Superheroes'. Read it, and didn't like it very much. The authors really go out of their way to say 'Superheroes are dumb'.
For anyone interested, there is a free course on Coursera that will cover the science of superheroes (among other things) as well as give you an opportunity to design and justify your own superhero. The course is free, 10 weeks long and begins in January 2013. If you have the interest and the time (6-9 hours per week), you should give it a shot.