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.
The American theme of Diana's costume was explained by Pérez in the Challenge of the Gods storyline in which Diana engaged in a series of trials arranged by Zeus as punishment for refusing his advances. Diana met the spirit of Steve Trevor's mother, Diana Trevor, who was clad in armor identical to her own. Trevor revealed that during World War II she had crashed on Themyscira while on duty as a U.S. Army pilot. She blundered into an Amazon battle against Cottus, a multi-armed demon, at the portal to the underworld. Trevor was drawn into the battle, although she was armed only with her side arm. She wounded the beast before suffering a mortal blow, allowing the Amazons to reseal the portal.
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.
Beyond the US and Canada, the film was released day-and-date with its North American debut in 55 markets (72% of its total release), and was projected to debut with anywhere between $92–118 million. It ended up opening to $125 million, including $38 million in China, $8.5 million in Korea, $8.4 million in Mexico, $8.3 million in Brazil and $7.5 million in the UK. In its second week of release, the film brought in another $60 million, including holding the top spot on France, the UK, Australia and Brazil. In the Philippines, it broke 2017 box office record for highest-earning non-holiday opening day—earning $4.7 million and becoming the 9th-most successful commercial film of all time as well overtaking the record set by Batman v Superman: Dawn of Justice. The film opened in its last market, Japan, on August 25 and debuted to $3.4 million, helping the international gross cross the $400 million mark. The biggest markets of Wonder Woman outside North America are China (US$90 million) followed by Brazil (US$34 million), UK (US$28 million), Australia($23 million) and Mexico($22 million).