Most girls don't like super heroes. So what? It just doesnt appeal to women. Most stuff in the media is geared towards women. Virtually every tv show or non action cartoon features girls who are smart and wise and boys who are bumbling buffoons. Its a big reason why boys are spending more time playing video games and less and less watching tv. Who do you think appeals to a boy, the guy from grand theft auto or the fruity boys in high school musical? Appealing towards women has destroyed the vampire gener. Gone are the days of Dracula. Say hello to the whinny little sissy vampires of Twilight. I shudder to think of what would happen to the super hero genre if we keep obsessing with appealing towards girls. I guess we'll have more books like Arana (shudder). Hell comic books and video games are two of the last media boys truly have left. Everything else is obsessed with appealing towards girls. I love the fangirls. I'm a nerd. If there are no girl nerds then where are future nerds suppose to come from. But they can have their Twilight and their Manga and let me have Marvel and DC.
Buffy wasn't all that different to a super hero and it had a huge female following. Angel had a big female audience as well. However, I don't see a lot of difference between the angsty, "I can't see you because you're a vampire and it's dangerous" and "I can't see you because I'm Spider-man and it's dangerous."
Just because a company wants to seek out a female audience doesn't mean they are going to turn the books into stereotypes.