First, I wasn't aware that Joss Whedon was on the Wonder Woman project. Second, I wasn't aware there actually WAS a Wonder Woman project. Third, if there is/was a Wonder Woman project, as much as I like Joss Whedon, he would not be right for it. Everything I know about him from television doesn't seem to fit Wonder Woman and everything I know about Wonder Woman comes from when I was a young kid living in Europe with no television, reading comic books.
I wouldn't WANT to do a Wonder Woman movie if I was anyone who already had a reputation in movies or entertainment. First, the costume. You cannot change it because then it wouldn't be Wonder Woman, but SOMEHOW you have to make it look good in live-action on-screen (
anything can look good in comics). Second, even though it was a TERRIBLE series way back when, you have to find someone that can fill out the costume the way that Linda Carter did, because that is actually what Wonder Woman looks like (she isn't a Buffy or a River). Third, you have to explain why a modern woman in the 21st century would wear that costume (even though she is
actually an Ancient Greek Amazon). Fourth, in Wonder Woman comic books she was always getting tied up, so it was sort of like a pseudo-bondage kind of thing and although that was common back in serials from the forties and fifties, I don't know how that fits the woman as hero in modern movies.
Of course, you COULD just
change everything. Maybe that is what they intend. But they changed Daredevil and that didn't work. They left Spiderman mostly the same and that DID work. Same with Superman. And Batman.