By the end of the war, Diana began to lose faith in both humanity and herself after Ares opened her eyes to humanity's potential for evil. While she still believed in the power of love and compassion to change humanity for the better, Diana was left sobered and emotionally broken over certain events from the war, such as the use of Dr. Poison's gas to massacre the entire village of Veld, and Steve Trevor's self-sacrificing death. After witnessing a "century of horrors", Diana largely stepped away from heroics until she witnessed the seemingly unstoppable Doomsday wreck havoc; ultimately joining in to battle him alongside Batman and Superman. After witnessing Superman's own sacrifice to stop the monster, however, Diana turned once again towards heroics; demonstrating not only her underlying belief in her own core values, but also in the positive effect true heroes can have on the world.
The Diana Prince alias also played an important role after the events of Infinite Crisis. Wonder Woman was broadcast worldwide killing a villain named Maxwell Lord, as he was mind controlling Superman into killing Batman. When Wonder Woman caught him in her lasso, demanding to know how to stop Superman, Maxwell revealed that the only way to stop him was to kill Lord, so as a last resort Diana snapped his neck. To recover from the trauma of killing another person, the Amazon went into a self-imposed exile for one year. On her return to public life, Diana realized that her life as a full-time celebrity superhero and ambassador had kept her removed from humanity. Because of this she assumed the persona of Diana Prince and became an agent at the Department of Metahuman Affairs. During a later battle with the witch Circe, a spell was placed on Diana leaving her powerless when not in the guise of Wonder Woman.
Before Steppenwolf could kill Cyborg, Superman comes and saves him, by easily overpowering the New God. Bruce tells Superman he needs to buy Cyborg some time to separate the Mother Boxes and to help civilians, Superman catches up with Barry, saying he got the ones on the right. After subduing Steppenwolf again, Victor calls Superman for help with the Mother Boxes. Steppenwolf is not down yet and tries to attack, but Superman freezes Steppenwolf's Axe and Diana breaks it with her Sword, which finally leads to Steppenwolf realizing he has been defeated and is overwhelmed with fear for the first time. He is attacked by his own Parademons before he returns back to Apokolips.
^ Sanderson, Peter (September–October 1981). "Thomas/Colan Premiere Wonder Woman's New Look". Comics Feature. New Media Publishing (12/13): 23. The hotly-debated new Wonder Woman uniform will be bestowed on the Amazon Princess in her first adventure written and drawn by her new creative team: Roy Thomas and Gene Colan...This story will appear as an insert in DC Comics Presents #41.