This article touches on how women have be depicted in comics through the ages, and how even as women gained more prominent roles they were depicted as sex symbols and degraded.
"I hope we do it sooner rather than later." Marvel Studios president Kevin Feige has responded to the frequent complaint that the studio's output doesn't give female superheroes their time in the spotlight.
Feige states that his hands are tied when making a female led superhero movie because they most stay true to the Marvel franchise and comics which the super hero movies are based off of, and they do not have many female superheroes to make a movie from.