I think they're in the process of making a Deadpool movie. I hope he gets to say his iconic one liners now.
I'm just not convinced with solo super heroine movies because there just isn't as much material to work with in comparison to solo male superheroes. Wonderwoman can be exciting at times and there have even been some good story lines in the past but they just haven't been as successful as the wealth of other material which surrounds other DC heroes. I remember a few years back there was a massive push to make WW relevant but it just didn't work.
I hate to say this but 99% of female characters in comic books are foils for their male counterparts, on their own, their character development, or lack of, becomes glaringly obvious.
The Deadpool movie has been in production hell for years. So I will believe it when I see a green light. Though I really hope they do.
And I do agree that the vast majority of female heroes are foils for or somehow related to a male counter part. Batgirl to Batman, Black Canary and her relationship to Green Arrow, Powergirl and Supergirl to Superman, etc. But that being said I would like to see a Wonder Woman movie since she was made as a stand alone character and the male love interest was the damsel in distress not her. And she is the only one of the DC Trinity to not have a movie. And I think for that, she deserves a movie.
But as much as I want to have a Wonder Woman movie, at the same time I would be very worried about it. Not so much whether there is source material you can make a movie on, but that most Hollywood super heroine movies tend to follow an over emphasis of the "badass female" thing. They try to overdo the badass stuff at the expense of femininity. To the point that she is more an anti-hero then a hero, and the character is no longer really seen as a woman, and more of a fantasy pinup. We see this with Elektra, the god awful Catwoman movie, and Barb Wire (yes that was once a comic from Dark Horse). When you look at these characters they are defined by skimpy outfits and their willingness to crack skulls and beat people up. These are not charaters. Characters have personality beyond skimpy outfits. And those that do have some kind of personality are very poorly written. They actually tried to do this to Wonder Woman in an NBC TV show pilot, and it never made it to the TV screens because it was that awful. And a violent antihero, Wonder Woman is not. And we can still have badass females who are still distinctly women. Ellen Ripley much?
So yeah if there is going to be a Wonder Woman on the big screen, she will probably be introduced like Black Widow was in Iron Man 2.