Wonder Woman's destiny in Justice League 3 was teased in her final scene in Zack Snyder's Justice League. The debut of the Justice League Snyder Cut in 2021 revealed stark differences from the Justice League theatrical cut, the product of extensive reshoots in Snyder's absence. The Snyder Cut's release was also accompanied with Snyder's outline of his planned Justice League 2 and Justice League 3, which sparked ongoing revival calls online with the hashtag #RestoreTheSnyderVerse.
In her final scene in the Snyder Cut, Diana Prince a.k.a. Wonder Woman (Gal Gadot) stands outside of the Greek Parthenon where her mother, Amazonian Queen Hippolyta (Connie Nielsen) fired the ancient arrow to warn of the Apokoliptian invasion led by Steppenwolf (Ciarán Hinds). Diana holds the arrow and looks off into the sunset on the horizon with a somewhat sorrowful look on her face, the arrow itself being her first tangible connection with her mother and her people in over a century. As it turns out, this teased where Diana was heading in assuming her mother's throne by the end of Justice League 3.
In Snyder's outline for the two Justice League sequels, the story for Justice League 3 details Diana fighting alongside the League and the entire world against the invasion from Apokolips led by Darkseid (Ray Porter) after the Knightmare future timeline had been prevented. In the battle, Hippolyta (Connie Nielsen) dies saving Diana. Following Darkseid's defeat, Justice League 3 was to conclude Diana's arc with her returning to Themyscira as the new Amazonian Queen, with her ending scene in the Snyder Cut acting as a tease for this.
Diana's ending scene in the Snyder Cut has a "so close, yet so far" emotional quality with her century-long separation from Hippolyta and the Amazons. In leaving to help Steve Trevor (Chris Pine) during World War I in Wonder Woman, Diana had to sacrifice everything dearest to her, in full knowledge of her mother's words that her departure meant that she could not return. In the ending of the Snyder Cut, Diana is closer to Themyscira than she ever thought she'd get to be again simply by holding her mother's arrow.
Snyder planned his DCEU story to span an arc over five movies, consisting of Man of Steel, Batman v Superman: Dawn of Justice, and a trilogy of Justice League movies, with various spin-offs such as Wonder Woman and Ben Affleck's planned Batman solo movie. While Henry Cavill's Superman was the foundation of the story, Gal Gadot's Wonder Woman was a crucial pillar herself, with her own journey of departing her people, building a new life in the world of man, and returning to Themyscira a new woman after her time with the Justice League.
The interest by viewers in seeing Diana's planned ending in a resurrected Justice League 3 has held consistently strong, and alongside numerous other redeemed character stories in the Snyder Cut, her arc's eventual conclusion is teased right out in the open. In Diana's mind, her emotional grasp of Hippolyta's arrow is the closest she'll ever get to returning to Themyscira. Unbeknownst to her, that exact return lay ahead for her in Justice League 3, just one of many such sequel teases in Zack Snyder's Justice League.
