Wonder Woman and Hermes briefly returned to Themyscira so that Diana could pay her respects to her petrified mother. When they got back to her apartment, they found Hera crying and mourning the days when she used to be a goddess. As Diana comforted her, she realized she would need help in finding Zola and Zeke. Wonder Woman went to the Taiga, Siberia, where she asked Artemis for her help. Artemis agreed, on the condition that she and Diana have a rematch. Knowing they are in Artemis' realm, Diana threw the fight in Artemis' favor.
Chris Pine was cast as Steve Trevor, a character he described as a "rogue-ish, cynical realist who's seen the awful brutish nature of modern civilization" and added that he is a "worldly guy, a charming guy". He signed a multi-picture deal. Lucy Davis' performance as Etta Candy is the first live-action cinematic portrayal of the character. As well, Elena Anaya's performance as Doctor Poison is the cinematic debut of that character. Nicole Kidman was in negotiations for the role of Queen Hippolyta, but was forced to drop out due to scheduling conflicts with Big Little Lies.
Aquaman has also had run-ins with the Olympian sea deities. Poseidon had long relinquished the title of Sea King to Orin of Atlantis, but when Aquaman's subjects lost faith in him, Poseidon arranged a challenge with his son Triton. Aquaman bested Triton and the godling fell from grace with his father. In anger, Triton slayed Poseidon and claimed his power. Aquaman freed Poseidon by appealing to Lord Hades. When they returned from the dead, Poseidon slew his son in turn. Disgusted with mortal affairs, Poseidon bequeathed his trident to Aquaman. Aquaman somehow lost the Trident, though, as it was last seen with Queen Clea.