Morgan appears and reveals himself as Ares. He tells Diana that although he has subtly given humans ideas and inspirations, using Ludendorff and Maru as pawns in the process, it is ultimately their decision to resort to violence as they are inherently corrupt. When Diana attempts to kill Ares with the "Godkiller" sword, he destroys it, then reveals to Diana that she herself is the "Godkiller", as the daughter of Zeus and Hippolyta. He fails to persuade Diana to help him destroy mankind in order to restore paradise on Earth. While the two battle, Steve's team destroys Maru's laboratory. Steve hijacks and pilots the bomber carrying the poison to a safe altitude and detonates it, sacrificing himself. Ares attempts to direct Diana's rage and grief at Steve's death by convincing her to kill Maru, but the memories of her experiences with Steve cause her to realize that humans have good within them. She spares Maru and redirects Ares's lightning into him, killing him for good. Later, the team celebrates the end of the war. In the present day, Diana sends an email to Bruce Wayne thanking him for the photographic plate of her and Steve and continues to fight and give on the world's behalf, understanding that only love can truly save the world.
After taking on the mantle God of War after killing her mentor War. Diana have shown some new abilities. She can now telepathically communicate and control all soldiers on the planet since she is their greatest leader. She hasn't shown the ability, but as her predecessor was able to bring back dead soldiers to fight alongside him, she might be able to do so as well.
Pérez and Potter wrote Wonder Woman as a feminist character, and Pérez's research into Greek mythology provided Wonder Woman's world with depth and verisimilitude missing from her previous incarnation. The incorporation of Greek gods and sharply characterized villains added a richness to Wonder Woman's Amazon heritage and set her apart from other DC heroes.