Comics started up and evolved in a time and in a way that pretty much means that, for a long time, there weren't any great female heroes out there. male teen escapist power fantasy and all that. Still, the '60s, 70s, 80s and 90s have past by now, and frankly, the studios still seem to think "we'll turn Thor female! And Captain America black! We're breaking the mold here, people, this is new and exciting!" (I'm aware it's neither).
Frankly, if we want an actual good female hero movie, I'd prefer it if they gave someone like Whedon a check and made a whole new franchise. Because no matter what you do with either DC or Marvel's universe, it'll still be patches and hotfixes to try and make a (white) male-centered universe more "balanced". Outside of the X-Men, how many heroines out there aren't quite frankly female versions of male heroes? Be it catwoman/batman, WW/SM, and whatever - they tend to still be the slightly-weaker-or-at-least-slightly-less-important versions. And I'm aware there's been lots of improvement - She-Hulk isn't just a female Hulk, - but she was. And say what you will, say "She-Hulk" to 100 random people in the street and 99 will think it's just a female Hulk.
*shrug* I like both comic universes. But an actual new strong female lead will, imo, have to come from elsewhere. Which doesn't mean she couldn't have comics and eventually tie in to a universe.