I read that Megan Gale was cast as Wonder Woman but it's also been reported that the ENTIRE cast has been let go.
Ok, You are referring, i believe, to the goerge miller directed justice league movie i believe, the wonder woman movie doesn't even have a script yet because Warners didn't think Joss Whedon knew what he was doing (cause he has no experience writing successfully targeting the teenage girl dmo)...the same weekend he quit wonder woman, the man who warner hired to write the flash movie and who is a flash geek (i think he even made the tv show) split ways with them as well.
The justice league movie did get 'cancelled' during the writers strike, they still might do it in the future, but the rumors were that batman would be in it but not bale (which would suck)