The film serves as an origin for the title character as she makes her first venture into man's world and has to stop Ares from destroying the planet with a world-wide war.
The film of course, is not canon with the DCAU continuity, but does share many similar plot elements with the Justice League episode "Paradise Lost" with Ares taking the place of Hades. He, too, is portrayed as having a history with Wonder Woman's mother, Hippolyta (even having a child with her), being imprisoned with the Amazons keeping watch over him, and bringing back dead amazons to fight while fighting Wonder Woman himself. Also, Diana defends herself from a lightning strike from Ares in an almost identical fashion as she did on "Hereafter" (to which Flash replied "There are so many reasons why that shouldn't have worked.").