Few superhero teams can match the power and prestige of DC's Justice League. The team regularly faces cosmic villains and threats to the fabric of reality itself, yet always manages to walk away victorious. However, one of DC's darkest futures saw the League crumble, and all because of a surprising hero.
With powerhouses like Superman, Wonder Woman, and Martian Manhunter, it's no wonder that the League is basically undefeatable. Even in universes where the League does disband, it's less often due to a crushing defeat, and more due to internal squabbles. Classic comics such as Kingdom Come show a League unable to reconcile their different views of justice, while more recent alternate universes such as Justice League: Last Ridesee the team breakup due to misplaced blame. While not unheard of, it's rare for the team to take a loss so hard that it destroys them. Yet, Dick Grayson once delivered a blow so devastating, that the League never recovered.
Related: Nightwing Twist Breaks a Basic Rule of the DC Universe
In Kyle Higgins and Trevor McCarthy's Nightwing: The New Order, a war breaks out between the heroes and villains of DC's universe. Centered on Metropolis, the war grows and grows, as does its body count. A turning point eventually comes when black kryptonite is used on Superman, making the Man of Steel kill Batman. With grief in his heart and no end for the war in sight, Nightwing has no choice but to act. He uses a piece of technology from Apokalips that erases 90% of the world's superpowers. Left powerless, the Justice League and their foes lay defeated, their newfound vulnerability catching up to them. Though Superman does live through the experience, the lack of heroes such as Wonder Woman, Barry Allen, Aquaman,
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