Christina Hendricks is best known for her role as Joan Harris. That show lasted from 2005-2015, and before that she had a very active career in film and television. She's in the upcoming show 'The Romanoffs,' about people who believe they are related to the famous Russian Romanoff family. As a redhead, I never would have assumed she would be up for the role, but she was more than up from the role. She practically had the role in Joss Whedon's 2006 planned version of the movie. As we now know, the movie was never made.
I'm not sure I believe Christina Hendricks as Woman Woman, but that might be a smart choice. Go with someone unexpected. We'll never know now. Gal Gadot seems to be DC's hottest ticket right now, so she's not going anywhere.