After the death of Superman, Wonder Woman became depressed and began to remember her origins differently, questioning aspects of her past such as whether she truly was mocked as a child and her relationship with Ares. In a fit of rage Diana crushed the helmet of War. Realizing that she shouldn't have been able to do that, she used the Lasso of Truth on herself and discovered that she had been deceived. Diana traveled to Olympus for answers, but found it abandoned. She also found herself unable to return to her home of Themyscira.
In May 2017, early tracking had Wonder Woman opening with $65–75 million, and possibly as high as $105 million. The film opened Friday, June 2, 2017, across 4,165 theaters and made $38.7 million on its opening day, including $3.7 million in IMAX. It was the biggest single-day gross for a woman-directed film, ahead of the $35.9 million opening Friday of Catherine Hardwicke's Twilight in 2008 and the biggest opening day for a woman-led comic book superhero film, ahead of Ghost in the Shell ($7 million). This included $11 million it made from Thursday previews, also the best start for a film directed by a woman, surpassing Fifty Shades of Grey's $8.6 million which was directed by Sam Taylor-Johnson, and the third-biggest of the year, behind Beauty and the Beast and Guardians of the Galaxy Vol. 2. Of that, $1.5 million came from IMAX screenings.
Gaines decided he needed another expert. He turned to Lauretta Bender, an associate professor of psychiatry at New York University’s medical school and a senior psychiatrist at Bellevue Hospital, where she was director of the children’s ward, an expert on aggression. She’d long been interested in comics but her interest had grown in 1940, after her husband, Paul Schilder, was killed by a car while walking home from visiting Bender and their 8-day-old daughter in the hospital. Bender, left with three children under the age of 3, soon became painfully interested in studying how children cope with trauma. In 1940, she conducted a study with Reginald Lourie, a medical resident under her supervision, investigating the effect of comics on four children brought to Bellevue Hospital for behavioral problems. Tessie, 12, had witnessed her father, a convicted murderer, kill himself. She insisted on calling herself Shiera, after a comic-book girl who is always rescued at the last minute by the Flash. Kenneth, 11, had been raped. He was frantic unless medicated or “wearing a Superman cape.” He felt safe in it—he could fly away if he wanted to—and “he felt that the cape protected him from an assault.” Bender and Lourie concluded the comic books were “the folklore of this age,” and worked, culturally, the same way fables and fairy tales did.
Lennox suggests meeting Siracca, a fellow demigod daughter of Zeus as well. She travels to Lybia and finds a girl trapped in a vase. The girl tells Wonder Woman that when the soldiers came, everyone hid in a bunker. Leading her down, she triggers a trap which sends a plethora of knives, swords and daggers at her. Blocking them all but one, Diana looks to find the girl dissolving to sand. Crying at her failure, her time to mourn is cut short as the real Siracca, albeit in a zombie like form, ambushes her.
Suddenly, Zola and the others were attacked by Artemis, who was sent by Apollo to kill Zeke, Zola's son. While Zola and the others escaped with Zeke, Wonder Woman took on Artemis by herself. Diana defeated Artemis and went to protect Zola and the others, while Ares took the defeated Artemis back to Apollo. However, the First Born and Cassandra, two of Zeus' illegitimate children, attacked Zola. Wonder Woman, Lennox and Orion worked together to fight the First Born, but he proved to be stronger than they had anticipated. Orion's Astro Harness incapacitated Cassandra, and Orion opened a Boom Tube so that Wonder Woman and her allies could escape. The First Born attempted to pry the Boom Tube open, but Lennox sacrificed himself so that the others could escape safely. Wonder Woman and her allies arrived at the other side of the Boom Tube and were greeted by Highfather, who explained that they were on New Genesis.
The next day, they decided to infiltrate Ludendorff's gala to learn more about the weapon he and Doctor Poison are creating and how to stop it. To enter the gala, Diana stole a dress from a guest where she dances with. She is prepared to kill Ludendorff, but her attempt is intervened by Steve. She hears Ludendorff release some of the gas where it kills citizens from that town.
The Diana Prince alias also played an important role after the events of Infinite Crisis. Wonder Woman was broadcast worldwide killing a villain named Maxwell Lord, as he was mind controlling Superman into killing Batman. When Wonder Woman caught him in her lasso, demanding to know how to stop Superman, Maxwell revealed that the only way to stop him was to kill Lord, so as a last resort Diana snapped his neck. To recover from the trauma of killing another person, the Amazon went into a self-imposed exile for one year. On her return to public life, Diana realized that her life as a full-time celebrity superhero and ambassador had kept her removed from humanity. Because of this she assumed the persona of Diana Prince and became an agent at the Department of Metahuman Affairs. During a later battle with the witch Circe, a spell was placed on Diana leaving her powerless when not in the guise of Wonder Woman.