The Incredibles is not just a family movie about superheroes fighting bad guys, it goes much deeper than that.  The Incredibles deals with fame, being shunned and hated, living in the past and going through a midlife crisis.  The movie opens up with a scene from the past when Mr. Incredible was in his glory days and how the world loved him, fast forward a decade and things are very different.  His family is shown as being very dysfunctional just like in your typical 2000's sitcom, the siblings hate each other, the baby is too much to handle and the wife stays home and takes care of everything and she doesn't like it.  Dad comes home from work angry and proceeds to sneak around.  Ahhh the American Dream.  Going back to the family, one member in particular is very symbolic.  Violet, the daughter has the ability to turn invisible and the ability to create force fields this is her way of hiding from the cruel world and all of her insecurities.  Even when not using her powers she tries to behind her hair.  Most of the other characters aren't very symbolic.  However they do things that are symbolic.  For example when Mr. Incredible wears his old suit instead of the new one it shows that he stuck in his glory days and that he isn't ready to move on.  When he fights the giant robot while wearing the old suit he realizes how weak and out of shape he is.  After this he starts working out along with bonding with his children and when that montage is over, he finally dons the vibrant red suit.  He and the family all wearing red suits which represent strength defeat the villain, Syndrome in the end.