That said, I cannot believe WW not being supported as a film has anything to do with an avoidance of promiting a female action hero.
Actually, the producers have said as much. I distinctly remember reading quotes by a producer (Joel Silver, I think) saying that the reason they weren't making the Joss Whedon version of WW was that action movies starring women don't work.
This is a typical Hollywood double standard. Nobody would suggest that people don't want to see sci-fi action movies starring handsome, white, straight men anymore just because Green Lantern and John Carter flopped, after all.
When you have script drafts by the writer/director of the third-highest grossing movie of all time and the co-writer of the highest-grossing one and still don't make the movie, there's gotta be other reasons than "we haven't found the right script yet".