Selina Kyle and Bruce Wayne, two of the most prominent citizens of Gotham City, were to be married at 6 a.m. on July 4. (Spoilers ahead!) It was intended to be a quiet, intimate ceremony with just the judge and two witnesses atop the city's Finger Tower skyscraper. It was a moment that has been building since the couple first met in 1940. It was also not meant to be.

The turn of events is revealed in issue No. 50 of "Batman," written by Tom King and drawn by Mikel Janin, along with almost 30 other artists who capture a moment in the nearly 80-year history of the couple. The issue, published by DC Entertainment, is available now at participating comic book stores.

Kyle and Wayne, or rather their famous costumed alter egos, met aboard a yacht as the Cat (as Catwoman was first known) planned a jewelry heist. The plot was thwarted by Batman, but the femme fatale may have stolen his heart. In the last panel of the story, Batman remarks to his sidekick, Robin, "Lovely girl. What eyes!" and adds, "Maybe I'll bump into her again sometime."

Over the next 78 years, the two have met again and again: often as enemies, sometimes as allies. In June 2017, their relationship reached a new level when the Bat, as she calls him, proposed to the Cat.

On that night, on a rooftop and in the rain, the hero revealed that he owned the diamond she tried to steal at their first meeting. "I knew I'd need it," he told her. "Just like … I need you." He then unmasked, knelt and said, "Marry me," in the glow of the Bat signal. It was a rare glimpse of light in the dark life of Batman, whose quest for justice began when, as a child, he witnessed his parents being killed during a robbery.

Kyle is assisted for her dawn wedding by Holly Robinson, a protégée. Robinson noted to Kyle that she had never seen Wayne so happy. "He always seemed to need his misery" to serve his crusade, she said. The observation begins to stir some doubt in Kyle, who asks, "Am I a hero?" Wayne has his own confidant, Alfred Pennyworth, his loyal butler for 75 years, who often wonders if his employer will survive his evening exploits. Wayne expresses his doubts to Pennyworth: "Can I be … happy?"

The answers to the questions are found in letters the couple have written to each other before their wedding day. Wayne's correspondence reveals an acceptance of Kyle, who in her time has been a villain and an antihero. "You're not someone who can be figured out. Or solved. And never will be," he declares. He also writes that he can be "more than a boy whose parents are dead," that he can be "the man who loves you. Who will always try to love you better." Kyle's letter lays out the truth as she sees it: "You're still a child, Bruce. A hurt child." Their happiness, she speculates, would kill Batman, who rescues everyone and turns pain into hope. "How can I do that," she writes. "To save the world, heroes make sacrifices."

In order to keep countless innocents safe, she concludes that she cannot marry Wayne. "My sacrifice is my life. It's you."

In the final moments of their story, the bride and groom end up at different locations in the early morning hours. In a silent page, Kyle sits on a rooftop, contemplating. She discards her veil and leaps toward the street. At the Finger Tower skyscraper, after an hour of waiting for his bride, Wayne realizes she is not coming. He throws off his tie and takes a similar leap, but in the opposite direction. Theirs is a story that is forever to be continued.