As Wonder Woman joins the Battle against Doomsday, she arrives just in time to save Batman from Doomsday's lethal thermal blast, deflecting the beams with her indestructible bracelets. She then jointly attacks Doomsday with Superman while Batman tries to expose the creature to Kryptonite, allowing its destruction. She relentlessly battles the monster, and despite Doomsday being stronger, Wonder Woman held her own, parrying a tremendous punch with the Sword of Athena, and then slicing off Doomsday's right arm with it. Eventually, Batman baits the monster into coming closer to her, allowing Wonder Woman to hurl the noose of her unbreakable Lasso of Hestia around his torso.
Alfred informs Bruce that people are in danger, which Batman tells Flash that he needs to save the civilians. Diana and Arthur try to keep Steppenwolf away from Cyborg by using the Lasso of Hestia to pull him down, then Steppenwolf attacked them both before he knocks Arthur into a wall breaking the ceiling before Diana saves him. Cyborg tries to keep Steppenwolf away from him, but fails which leads with Steppenwolf pulling off one of his legs.
Issue #600 introduced Wonder Woman to an alternate timeline created by the Gods in which Themyscira had been destroyed and the Amazons scattered around the world. In this timeline, Diana is an orphan raised in New York who is learning to cope with her powers. The entire world has forgotten Wonder Woman's existence and the main story of this run was of Diana trying to restore reality even though she does not properly remember it herself. Diana has no memories of her prior adventures as Wonder Woman, recollecting her memories in bits and pieces and receiving different abilities and resources (such as the power of flight and her lasso) during the progression of her adventure. A trio of Death Goddesses called The Morrigan acted as Wonder Woman's main enemies. Diana ultimately defeats the evil goddesses and returns everything back to normal.
Diana's treacherous paternal half-brother, based on the Greek mythological god of war, who masquerades as a speaker for peace on the Imperial War Cabinet as part of his deceptive master plan of conquest and destruction. Describing the Sir Patrick persona of his character, Thewlis said, "Sir Patrick's entire drive through the other half of the story is to bring about the armistice. That's his whole intention no matter what's going on. He meets Diana and see in her somebody who is sympathetic to his cause, quite vehemently so."
The "Diana Prince" identity has been part of Wonder Woman's history since her comics debut in 1941. In the early Golden Age stories, Wonder Woman served as a military secretary during World War II, using Prince as her cover. Later occupations Wonder Woman performed as Prince included translator at the United Nations, Air Force captain and ambassador, and in the '70s TV series, Lynda Carter's Wonder Woman used Prince to serve as an agent of the Inter-Agency Defense Command. In the DC Extended Universe, Prince works as curator for the Department of Antiquities at the extremely prestigious Louvre Museum and is held in very high esteem by the curator of the Gotham City Museum of Antiquities. Her tremendously long life span, accumulation of immense amount of knowledge and exceptional perceptiveness makes Diana Prince the wisest and most emotionally-intelligent member of the Justice League.
Diana sees Sir Patrick Morgan in the base, who reveals himself to be the true Ares, and tells her of his plan for a world without humanity by having them destroy each other. Ares proposes that Diana help him accomplish his vision of paradise, but Diana promptly refuses, not wanting to kill billions of innocents. Ares then reluctantly engages her in an epic battle while Steve and his comrades attempt to dismantle the plane harboring the mustard gas.