i'd rather see a Batgirl or Huntress flick.
or even Black Canary...
or Power Girl...
Warner Bros has moratoriumed any future productions with a female lead. This after the WW DTDVD didn't sell well enough fast enough.
And yes, it is animated, but do you really expect they're gonna put even MORE money at risk for a LA version?
You don't see Marvel doing any female led LA super-movies either.
I DO think they might be able to get Supergirl in as a supporting character MAYBE if they get the core Superman franchise back off the ground, but it's a long shot.