I think it's an interesting experiment, and a great opportunity to bring a female to the front for a change without making her too much about "girl-ness" (hopefully). We don't get many. And when the common public thinks superheroes, it's hard to find people whose idea of female heroes are of back-ups like BW in the avengers, or fragile supporting characters. There are some notable exceptions, but not enough.
Unless you're a girl that's into comics and reading from a young age, you don't see many super-heroes to look up to, while boys have had plenty for like a hundred years since Superman. So maybe this will give young girls a pop-recognizable superhero to "wish that they were", like many boys did with Batman/Wolverine/etc. So yeah, I'm curious to see how it goes and I hope it's successful.
in addition: Just because of the publicity this will get, young girls will find out about the existence of this. Like I said, growing up, you had to be into X-Men first to look up to a strong character like Jean Grey, or even Mystique. The girl heroes just haven't been very noticeable in the mainstream. On the flip side, even if you've never heard of comic books, you know who Batman is. Same can be said for plenty of male heroes. While girls have Wonder Woman, there should be more than that.