Their first adventure together as a serious couple involved a battle with Doomsday, a monster of Kryptonian legend. Superman, already familiar to the monster, explained that Doomsday was sealed into a pocket dimension called the Phantom Zone. Seeking preparation against enemies that could match them in power, Wonder Woman asked Hephaestus to forge weapons for them. Later, the Justice League intercepted the arrival of General Zod, another Kryptonian survivor. Superman gave him shelter in the Fortress of Solitude, but the couple discovered their relationship was now public knowledge.
On November 3, 2016, Rupert Gregson-Williams was hired to write and compose the film's music. He was joined by Evan Jolly, Tom Howe, Paul Mounsey, and Andrew Kawczynski, who provided additional music. The soundtrack was released on CD, digital, and vinyl the same day as the film. Australian musician Sia sang a song for the film, titled "To Be Human", featuring English musician Labrinth. Written by Florence Welch and Rick Nowels, the track is also featured on the soundtrack. The soundtrack also features samples from Wonder Woman's theme "Is She with You" from the Batman v Superman: Dawn of Justice soundtrack composed by Hans Zimmer and Junkie XL.
Wonder Woman (vol. 1) #105 revealed that Diana was formed from clay by the Queen of the Amazons, given life and power by four of the Greek and Roman gods (otherwise known as the Olympian deities) as gifts, corresponding to her renowned epithet: "Beautiful as Aphrodite, wise as Athena, swifter than Hermes, and stronger than Hercules", making her the strongest of the Amazons. Wonder Woman's Amazon training gave her limited telepathy, profound scientific knowledge, and the ability to speak every language – even caveman and Martian languages.
Hidden behind this controversy is one reason for all those chains and ropes, which has to do with the history of the fight for women’s rights. Because Marston kept his true relationship with Olive Byrne a secret, he kept his family’s ties to Margaret Sanger a secret, too. Marston, Byrne and Holloway, and even Harry G. Peter, the artist who drew Wonder Woman, had all been powerfully influenced by the suffrage, feminism and birth control movements. And each of those movements had used chains as a centerpiece of its iconography.
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.
At the end of Infinite Crisis, Wonder Woman temporarily retires from her costumed identity. Diana, once again using the alias Diana Prince, joins the Department of Metahuman Affairs. Donna Troy becomes the new Wonder Woman and is captured by Diana's enemies. Diana then goes on a mission to rescue her sister, battling Circe and Hercules. Diana defeats the villains, freeing Donna and takes up the role of Wonder Woman again. Circe places a spell on Diana, which renders Diana into a normal, powerless human being when in the role of Diana Prince; her powers come to her only when she is in the role of Wonder Woman.
Wonder Woman is suggested as being queer or bisexual, as she and another Amazon, Io, had reciprocal feelings for each other. Grant Morrison's 2016 comic Wonder Woman: Earth One, which exists parallel to the current DC comics Rebirth canon, Diana is depicted being kissed on her right cheek by a blonde woman who has put her left arm around Diana.