In modern times, Diana operates as the curator of the Louvre Museum as Diana Prince. Two years following the Battle of Metropolis, Diana came into conflict with Lex Luthor, who discovered a photograph of Diana and the Wonder Men during his search for metahumans. During her pursuit of Luthor, Diana crossed paths with Bruce Wayne, who discovered her secret after their confrontation during his search for the White Portuguese. Later, along with the photograph on Luthor's files Bruce sent her, Diana discovered the evidence of metahumans in the world. With her mission fulfilled, Diana prepared to depart back to London, but the emergence of the monstrous Doomsday led Diana to ally herself with Superman and Batman to take down the monster in a fierce battle that ended with the tragic death of Superman.
One of the things I love about event comics is that sometimes even a middling to bad event can lead to a great spin-off or post event tie in. Day of Judgement gave us J.M. DeMatteis's run on The Spectre. Infinite Crisis gave us Jeff LeMire's great run on Superboy. While not a new series, Dark Nights Metal allowed James Robinson to have the near perfect ending to Jason's story in Wonder Woman.
Although seemingly only a purely decorative aspect of her costume, in the golden and silver ages, her earrings were sometimes depicted as giving her the ability to breathe in outer space. Gelignite Grenade Earrings and Grappling Hook Bracelet - In her depowered mod girl phase, Diana on rare occasion employed these devices, which were concealed to look like regular parts of her costume. She acquired them from a demolitions expert and villain which she had helped reform. The grenades were strong enough to blast through a thick steel door and the grappling hook could support easily her body weight to aid in climbing.
Shortly after coming to the outside world, Diana interrupted a terrorist attack and was named "Wonder Woman" by the press. She continued to use her gifts to fight for peace and justice in Man's World. She later fought who she thought to be Ares, though in truth it was Phobos and Deimos who were disguised as their father. Fearing that she would eventually discover the truth and free Ares from his prison beneath Themyscira, the Gods of Olympus sent Phobos and Deimos to erase all memory of Themyscira from Diana's mind. The twin gods were unable to erase the memory, so instead they later implanted false memories regarding her home to deceive Diana, leading to a completely separate origin story and causing her to hallucinate new adventures. Diana was unaware that her memories had been tampered with, and believed the falsifications until her search for the truth led her to Ares himself years later.
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.