No one. In my honest opinion, I think female super heroes are about as needed as the WNBA! No one watches or cares about the WNBA, just like female superheroes. Same goes for Elektra... no one cared about that movie. Catwoman was only good with Batman, when she got her own movie it sucked. I'm starting to see a pattern.
If ANYTHING, I think they should do it like they did Batgirl with Batman... Batman and Robin to be exact. They didn't have a movie with JUST a female superhero, but she was teamed up withe Batman and Robin, making it much less painful to watch than some movie focusing on some stupid girl having issues and kicking ass because she's suffering from PMS.
Female super heroes should only exist when teamed up with many other people or just a few males. X-Men for example, quite a few women and quite a few men. I like the X-Men (or should it be X-Women too.... even then, they think male) and I like that you have a good mix of estrogen and testosterone.
It's been said that I am female, sometimes, but even then, just because I'm a chick doesn't mean I believe that because there was a male Spiderman, Batman, etc. that there needs to be a Wonder Woman, Batgirl or Spiderchick!
Don't get me wrong, if they can actually make a female super hero movie worth watching more than the initial curiosity watch, I will be there, but I just don't see it happening.