Following the Rebirth retcon, the "Year One" storyline explains that while put in a cell after coming to Man's World, Diana was visited by the Greek gods in animal form. Each gave her powers that would reveal themselves when she needed them to. She first displays strength when she accidentally rips the bars off her cell door when visited by Steve Trevor, Etta Candy, and Barbara Ann Minerva. Later on a trip to the mall, she discovers super speed, great durability, and the power of flight while fighting off a terrorist attack.
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.
After an intensive talent search, Lynda Carter, who had had a handful of minor acting roles and had been the 1972 Miss World USA and a Bob Hope USO cast member, was chosen for the lead role. For the role of Steve Trevor, the producers chose Lyle Waggoner, despite his dark brown, almost-black, hair not matching the comic's blond Trevor, who at the time was better known as a comedic actor after several years co-starring in The Carol Burnett Show. He was also known to Ross as having been one of the leading candidates to play Batman a decade earlier, but instead Adam West was signed. Waggoner was also considered a sex symbol, having done a semi-nude pictorial in the first issue of Playgirl.
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.
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".
Demeter, the goddess of agriculture and fertility, blessed Diana with strength drawn from the Earth spirit Gaea, making her one of the physically strongest heroes in the DC Universe and the strongest female hero in the DC Universe. This strength has allowed her to easily overwhelm Superman and Supergirl. She has also held her own against Darkseid. Her strength has no measurable limits and she can break the Chronus Scepter, which is universal in its destructive power. However, now Diana is the daughter of Zeus, king of the Greek Gods, so it is unclear as to how much of her power and strength is a direct result of her divine heritage. Her connection to the earth allows her to heal at an accelerated rate so long as she is in contact with the planet. However, as mentioned earlier, now that she is a demigoddess, it has been suggested that she heals extremely quickly also due to her divine heritage. In rare cases where she has been gravely injured, Diana showed the ability to physically merge with the earth, causing whatever injuries or poisons to be expelled from her body; such an act is considered sacred, and can only be used in extreme cases.
After Sekowsky's run ended in the early 1970s, Diana's roots were reverted to her old mythological ones and she wore a more modernized version of her original outfit, a predecessor to her "bathing suit" outfit. Later, in 1976, her glowing white belt was turned into a yellow one. For Series 3, artist Terry Dodson redrew her outfit as a strapless swimsuit.
Carolyn Cocca has stated that Wonder Woman possesses a "duality of character" due to the character possessing both feminine and masculine qualities in her physical abilities and attitude, which Cocca felt made her more appealing to a wide audience. Wonder Woman's first female editor, Karen Berger, claimed that, "Wonder Woman [is] a great role model to young women, but also contains many elements that appeal to males as well. Wonder Woman crosses the gender line.". Berger worked with George Pérez on the new issues of Wonder Woman starting in 1987, and the new Diana "works with friends and allies to teach lessons of peace and equality."