The Crime Syndicate imprisoned the Justice Leagues inside the Firestorm Matrix which psychologically placed them in situations that depicted their greatest failures. Wonder Woman was placed in a situation where she was forced to do battle against both Amazons and humans for the lives of Superman and Steve Trevor. Martian Manhunter and Stargirl attempted to break her out but Wonder Woman ignored them.
Ares appears as a major antagonist in the live action Wonder Woman film. In Queen Hippolyta's story about Ares which she reads to Diana, Ares was condemned by the other Olympian Gods for his warmongering which led to him killing the Gods where the images show him killing Apollo, Artemis, Athena, Hades, Hestia, and Poseidon until Zeus drove him off of Mount Olympus with his thunderbolts. In his dying breath, Zeus created Themyscira for the Amazons and left them the "Godkiller" required to kill Ares should he rise again. This happens during World War I where Wonder Woman managed to slay Ares.
Steve Rose in The Guardian criticized the film for failing to explore the material's potential for "patriarchy-upending subversion". Peter Travers of Rolling Stone criticized the film's over-reliance on exposition: "Wonder Woman is hobbled by a slogging origin story and action that only comes in fits and starts. Just when Gadot and director Patty Jenkins...are ready to kick ass, we get backstory."
Impressed by this unknown woman's self-sacrifice, the Amazons entombed her with honors and clothed her in armor displaying the American flag pattern on her uniform, which they assumed were her heraldic colors. Trevor's legacy was also the primary reason why Ares arranged for Steve Trevor to bomb the island, as he could not resist the irony of the heroine's son unwittingly killing her admirers.