Spoilers ahead for Batman: Urban Legends #19!
A conceptual amalgamation of Two-Face and Robin nearly made Damian Wayne the monster he's always feared he was. As Harvey Dent contemplated the possibilities of a trap he placed the scion of Bruce Wayne in, one potentiality shows a deep-seated anxiety of Damian's brought to life.
Since the son of Batman first came into his father's life, Damian has wanted nothing more than to earn his father's respect. Despite his terrible upbringing with the League of Assassins, and the influence of his mother, Talia, Damian proved he had what it took to be a hero by taking on the identity of Robin. However, even when he's attempted more heroic endeavors, Damian has struggled with his own violent impulses when it comes to criminals. The inability to shed his more brutal style of dealing with villains has caused Damian to have some serious self-doubts about his future as a hero.
And those private doubts and fears Damian holds were nearly realized thanks to Batman's duality-obsessed rogue, Two-Face. In Batman: Urban Legends #19, the short story "Call It" by Joey Esposito and Mikel Janín shows the young Robin in peril as Batman squares off against his old ally. The evil villain Two-Face has trapped Robin and suspended him high about the city. As is his wont, Harvey Dent leaves Robin's fate up to chance and flips his trademark coin. As the coin rotates in the air, Two-Face gets lost in the possibilities of what the future could hold. He contemplates several potential futures such as him working alongside Batman and Commissioner Gordon once more, or growing old with the heroes and villains of Gotham. But the darkest future Dent conjures is one where Damian emerges from the trap as a Two-Faced version of Robin and becomes Dent's sidekick.
Usually it’s the Joker that tortures Robins and leaves them scarred for life, but even Two-Face isn’t above putting Batman’s sidekicks in danger when he has to. Interestingly enough, Dent's potential future brings up an actual fear of Damian's, even if the villain isn't aware. Having Damian's dark side externalized in the form of a Two-Face Robin variant is the perfect way to capture the youth's biggest anxiety regarding his place in the Bat-Family.
Damian has always been afraid that deep down, he not only isn't good enough to be a hero, but that he could be a monster. It’s not Damian’s fault that Talia al Ghul raised him from birth to conquer the world and essentially brainwashed him in his tender years. But that programming has been hard to shake, and occasionally, it still comes out. Whether it’s killing villains or imprisoning them without trial, Batman’s son has a side of him that the more moral parts of him can’t stand. Damian's been facing an internal struggle for some time now and nothing shows that off better than seeing him as Harvey Dent's sidekick. While Two-Face isn’t likely to get a Robin soon, Damian Wayne still has to deal with his own dark half.