Adrianne Palicki is one of the actresses on this list who actually had the role of Wonder Woman in the bag. Not only that, she even was officially Wonder Woman back in 2011. You see, back in 2011 there was a Wonder Woman TV series that even had a pilot shot starring Adrianne Palicki. I'm sure you can still find it online somewhere, if you're good at searching the dark depths of the internet. I saw some of it, and it's not great, though I don't blame that on Adrianne Palicki.
A few years later she ended up having a role in 'Agents of S.H.I.E.L.D.' so she wasn't completely dejected from the world of superheroes. How would you feel if the opportunity to play an iconic character slipped through your fingers? I'd be upset, that's for sure.