Thanks to Disney's "primarily target superheroes at boys" mindset, not many Marvel superheroines outside of the X-Women have exploded yet. So there's no point in denying Jean and Ororo their unarguable iconic statuses (even though Storm was not so surprisingly not as high as she should be).
I was pleasantly surprised to see Monica Rambeau make it in the Top 10 though, especially over the likes of Jessica Jones, Spider-Gwen and Squirrel Girl.