Upon becoming a super-heroine, Wonder Woman became a founding member of the Justice League. Her ambassadorial duties required her to visit Washington D.C., with army officer Steve Trevor as her liaison. When Parademons stormed Metropolis, Wonder Woman resolved to defend the city, meeting the heroes Superman, Batman, Flash, Green Lantern and Aquaman. They also met the young hero Cyborg, who attempted to warn them against the evil alien conqueror Darkseid. Unfortunately, Cyborg's warnings were meaningless, as Darkseid had already arrived. Although Darkseid had initially beat them without effort, Green Lantern rallied them in order to confront Darkseid as a team. Wonder Woman proved crucial in Darkseid's defeat, stabbing him in one of his eyes to prevent him from using his Omega Beams. This gave Superman and Cyborg enough time to throw Darkseid back into his home-world.
In an October 25, 1940, interview with the Family Circle magazine, William Moulton Marston discussed the unfulfilled potential of the comic book medium. This article caught the attention of comics publisher Max Gaines, who hired Marston as an educational consultant for National Periodicals and All-American Publications, two of the companies that would merge to form DC Comics. At that time, Marston wanted to create his own new superhero; Marston's wife and fellow psychologist Elizabeth suggested to him that it should be a woman:
Later, in London, Diana talked with Hessia about what being Queen really meant. Hessia told her the changes she was trying to impose were hard, and it might take a long time for the Amazons to accept them. Wonder Woman was called by the Justice League to look for the survivors of another missing village. As part of the operation, Superman explored the interior of a volcano until he was attacked by insects and lost contact with the League. Wonder Woman and Batman were next to enter the volcano and found Superman safe and sound. Exploring the volcano further, the heroes found the missing villagers dead and their remains encased in cocoons by one of the volcano’s insectoid denizens. Wonder Woman almost killed one of these creatures, until the League intervened and took the creature to the Watchtower for medical attention. Upon returning to Paradise Island, Diana spoke to the spirit of Hippolyta. Comforting her daughter, Hippolyta motivated Diana into accepting her duty as God of War. Diana also learnt that relations between Amazons and the Sons of Themyscira had gone sour and the Amazons had created Donna Troy from magical clay, an Amazon who sought to replace Diana as Queen.
Throughout Diana's childhood, she was training and sparring with her Amazonian sisters. One day when pilots were test flying, one of the pilots called Steve Trevor, has an accident with his plane, and Hippolyta opens Themyscira's shields and disguise, and Steve Trevor lands his plane on Paradise Island. Steve then proceeds to explore the island, and that's where he finds beautiful women bathing, but while staring at the women, Diana surprises him from behind and takes him out by kicking him in his testicles. Steve is then strapped up because of Hippolyta keeping him safe until someone proves worthy enough to escort him back to the USA. Wonder Woman while covered in a helmet, wins the challenges and gets to escort Steve back home, but while the challenges were going on, a traitor in the Amazons freed Ares because she loved him. Ares is free, and he goes to Hades so he could remove the bracelets blocking his powers.Throughout being in USA, Diana also tries to stop Ares' plans as Wonder Woman, but she fails the first time, and Ares gets ahold of the power he was searching for. After calling in his army, the US finds an island that appeared out of nowhere on the map, that being Paradise Island. They set off a nuke towards Paradise Island, and Steve manages to stop it, and at the same time, Wonder Woman defeats Ares with help from her Amazonian sisters. She realizes her feelings for Steve, and she kisses him, but when being back in Paradise Island, she looked sad. Hippolyta allowed her to operate in the outside world where she shared her feelings and her life with Steve.
Her tiara's signature star symbol is now an eight pointed starburst. According to designer Lindy Hemming and director Patty Jenkins, every design decision made for Themyscira came down to the same question: "How would I want to live that's badass?" "To me, they shouldn't be dressed in armor like men. It should be different. It should be authentic and real ... and appealing to women." When asked about the decision to give the Amazons heeled sandals, Jenkins explained that they also have flats for fighting, adding "It's total wish-fulfillment ... I, as a woman, want Wonder Woman to be sexy, hot as hell, fight badass, and look great at the same time ... the same way men want Superman to have ridiculously huge pecs and an impractically big body. That makes them feel like the hero they want to be. And my hero, in my head, has really long legs." This corresponds to the original intent by William Moulton Marston, who wanted his character to be alluringly feminine.