Though 'misogyny' is taking it a little far, I think 'sexism' (which to me is a rather different thing -- as it can mean thoughtless inequity without outright nasty feeling toward women) is at least part of the marketing.

It's not so much that I need the books to be about superheroing as that I'm not holding my breath for 'a book about the domestic lives of male superheroes.' Or, for that matter, a book about a team of female heroes kicking ass.