The Young Justice series by Brian Michael Bendis, John Timms and Patrick Gleeson has just wrapped up, but this isn't the first time the young team has called it quits. While it may be sad to see them go, the original reason they disbanded is far more tragic.

At the time of 2003's Titans/Young Justice: Graduation Day by Judd Winick, Ale Garza, Trevor Scott and Marlo Alquiza, the Young Justice team is made up of Tim Drake/Robin, Connor Kent/Superboy, Bart Allen/Impulse, Cassie Sandsmark/Wonder Girl, Lilith and Empress. Both they and the Titans, led by Nightwing, Troia and Arsenal, are attacked by a seemingly insane robot from the future, who latches onto Titans member Cyborg and tries to hack into him. Without thinking, Impulse, Empress and Superboy all attack the robot, who teleports away with a huge energy surge, leaving Impulse and Empress injured and Cyborg's legs completely destroyed.

Cyborg insists that the robot was just confused, and that it had accidentally traveled from the future and was trying to find a way to communicate. It causes more havoc, however, exploding a Star Labs facility, and the remaining Titans and Young Justice members go to apprehend it. When they arrive, however, it seems Superman is already dealing with the situation, although he seems to be in some kind of trance. Lilith, being a psychic, attempts to release him from this through physical contact, but too late she realizes that this isn't the real Superman.

Related: Young Justice Just Took Down a MAJOR Justice League Hero

A Superman robot holding the beaten body of Bart Allen

Years prior, Superman created a series of robotic androids with powers nearly identical to his own to serve in his place if ever he was needed but not available. Eventually all of the robots malfunctioned, and some had even become violent. This one, which was being studied at the lab, had been released in the explosion, and when Lilith had tried to connect with it, the android snapped her neck, killing her. It incapacitates Impulse and Titans member Tempest (formerly Aqualad), and even though the team manages to wear him down substantially, it still its heat vision to kill Troia. Arsenal reprograms the robot from the future to destroy the crazed android, but at that point, the damage has already been done.

In the aftermath, both teams are left in disarray. Wonder Girl calls her team nothing but "Stupid, inept children, running around pretending to be superheroes," and Nightwing believes that he has to stop his team before they end up killing even more of their loved ones. With that, both Young Justice and the Titans disband.

Related: Why Titans Season 3 NEEDS Joker's Daughter

Death of Donna Troy

In the closing pages of the issue, Cyborg insists that Wonder Girl is wrong, and vows to prove it. The heroes become a team once again later that year in Teen Titans by Geoff Johns, Mike McKone and Mario Alquiza, this time led by Cyborg and former Titans member Starfire. Each of them has their own reasons for joining, with Superboy not content with his mundane life, Wonder Girl not being accepted into normal life, and Robin just needing some time to spend with his friends.

With Young Justice splitting up for such a brutal reason, the formation of a new team didn't exactly start off smoothly, but eventually they went on to become one of the best iterations of the classic team.

Next: Teen Titans Just Suffered Another Few SINISTER Betrayals