Diana then arrives to stop Ares, and brings Steve Trevor to the US.Arriving in Boston, she meets Professor Julia Kapatelis. After fighting a monster named Decay sent by Phobos, a son of Ares, Diana, Julia and Steve discover Ares' plan: to start a nuclear war worldwide. Joined by Steve's friend Michaelis, the group travel to the military bases Ares' minions had taken control of and avert nuclear war. Ares
Steve Trevor's secretary who befriends Diana. Describing her character, Davis said, "She's a woman in a man's world and so being heard and seen aren't the easiest things, but it kind of doesn't deter her", adding, "Etta is unapologetically herself and I think that that's the thing that has drawn me to her the most". When asked if she was previously familiar with the character, Davis responded, "No. I wasn't. It took me a while to know that I was auditioning for Etta because even when I found out it was Wonder Woman, I still had no idea what the role was. It took a little while then I Googled the character". On Etta Candy's relationship with Steve Trevor, Davis said, "One of the great things that Etta gets to work with Steve Trevor is because Steve is not your typical man, in that he does entrust her with things that in 1918 probably wouldn't have been entrusted to a secretary of somebody who is quite important", further explaining, "So I think that [Trevor] needs her just as much as she needs that because now she's been given responsibility that she wouldn't have normally be given before, and equally he has somebody who could probably fly under the radar a bit. So he can trust the person who no one's really looking at".
On June 22, 2018, it was reported that Gal Gadot would be attending Warner Bros' DC presentation at San Diego Comic-Con (SDCC) 2018, and some footage from the film would be shown to promote it. Director Patty Jenkins and actors Gadot and Chris Pine attended the Wonder Woman 1984 panel at SDCC on July 21, 2018, where a short clip of the film was shown. A teaser poster debuted on June 5, 2019, one year ahead of the film's release date.
She is able to astrally project herself into various lands of myth. Her physical body reacts to whatever happens to her on the mythical astral plane, leaving her body cut, bruised, or sometimes strengthened once her mind and body are reunited. She can apparently leave the planet through meditation and did this once to rescue Artemis while she was in Hell.
A Blackfoot demi-god, and a smuggler who trades with both sides of the war and knows how to get people across the front lines. On his casting, Brave Rock said, "I had no idea it was for Wonder Woman. I lost it when I showed up and I couldn't remember my lines. I didn't take it literally until a month later, I got a call saying I got the role and they wanted me to fly to London for a fitting." Brave Rock raised several concerns with Jenkins over the representation of the character in the film, particularly that he was not comfortable playing into stereotypes and that he was not keen on his character being simply known as "Chief". Jenkins responded by giving him some extra creative control over his character which Brave Rock says was "unprecedented".
Filming occurred outside the U.S. Capitol in Washington D.C. during mid-June. Other filming locations around DC included the Penn Quarter neighborhood, McPherson Square, the DAR Constitution Hall near the White House, the Museum of Natural History (Smithsonian), and the Lincoln Memorial. By mid-July, production in the United States was completed and moved to England. In August, filming on location took place in several places around London, including St. Andrew's Place, Regent's Park and the Royal College of Physicians. Between September and October 2018, production also took place at Almería, in Andalusia, southern Spain, as well as Fuerteventura and Tenerife in the Canary Islands.