If there is to be a Wonder Woman film franchise, they pretty much would have to bring Cheetah into the mix at some point or another. But for a first film I do believe Circe or Ares would be a better fit, since the the plot would largely be about establishing Wonder Woman's character and origins-Cheetah can wait for a second film to help flesh her out more.
One thing everyone forgets about Cheetah (*keff*Pfifer*keffkaff*) is that she's Wonder Woman's relative equal in terms of power. So yeah, some scratches and bruises would be appropriate.
Continuing with Cheetah, I like your take on her current outfit as well as how you did her feet, giving her a slightly more monsterous feel. The nose looks a little pointy, but the bared teeth are just lovely in showing she's just not a hot chick with fur. Plus from the looks of it you gave her more of a tan coloration instead of that silly orange tone colorists keep giving her (who do they think she is, Tigra? Oy vey.)
Oh yeah, and one snag: It looks like Barbera's missing a finger on her right hand, there. Overall though this is an awesome, action packed piece