Over view:
A modern man's trespass of the island of the Amazons enables an imprisoned war god to escape and Princess Diana wins the responsibility to recapture him.
Based off of the script from the 2009 animated feature film which I thought was amazing and should be used for a live-action film; so that is what this fan cast for a live-action Wonder Woman movie is based off of.
WONDER WOMAN/PRINCESS DIANA:TAYLOR COLE
I recently saw a photo of Taylor wearing an actual Wonder Woman costume and now has me convinced that she would be perfect for the role plus she is relatively an un-known actress; which would help audience see Wonder Woman on screen and not a well-known actress.
STEVE TREAVOR:MARK PAUL GOSSELAAR
Mark has had struggling career as had an actor since "saved by the bell." The character of Steve would suit his acting range and would help bring him back into the lime light.
HIPPOLYTA:LYNDA CARTER
What would a Wonder Woman movie be without an appearance from the original Wonder Woman Lynda Carter; she would be perfect as Hippolyta.
ARTEMIS:AMY ADAMS
Keeping with continuity I have Amy Adams reprising her role as Artemis.
HERA:LENA HEADEY
Lena has proven in the movie 300 that she can play a powerful queen and why not have her play the queen of the GODS as HERA.
ZEUS:SEAN BEAN
Sean Bean played Zeus in Percy Jackson and I think he was well suited for the part. I would have him change his hair to white so it wouldn't look like Boromir in a Wonder Woman movie.
The Villains...
HADES:RALPH FIENNES
Ralph is the ultimate bad guy I would watch him in anything; besides he has portrayed the character on screen already. Hades would be a background villain keeping himself to the shadows seldom heard & seen.
ARES:STEPHEN MOYER (Main Villain)
Stehpen is Ares just look at the guy he has the evil presence down pact.
CHEETA:LUCY LAWLESS (Supporting Villain)
Lucy is perfect for an older version of Wonder Woman but in an origin story would fit the role of Cheeta and make it her own. She would look awesome fighting against Taylor.