What are some interesting plot ideas for a Joker Harley OC fanfiction?

One idea could be that the OC is a new villain in Gotham who catches the Joker's attention. He decides to use the OC to make Harley jealous, which then leads to a complex love - triangle - like situation full of drama and chaos.

One plot idea could be the Joker trying to prove his love to Harley in a really extreme way, like taking over Gotham City and dedicating it to her. It shows his over - the - top and crazy way of loving.

One idea could be a story where Harley Quinn tries to break free from the Joker's control completely and starts her own life of crime without him. She could form her own gang and prove that she's more than just the Joker's sidekick.

One plot idea could be Harley trying to break free from the Joker's control in a more psychological way. Maybe she starts having dreams that show her a different life without him, and she begins to question their relationship while still being in love with him. Another idea is a story where the Joker and Harley team up with other villains from the Dark Knight universe against a common enemy. For example, they could join forces with Bane to take over Gotham, but there are internal power struggles within their alliance.

A third plot could involve an external force trying to break them apart. Maybe a rival criminal or a vigilante realizes that Harley is Joker's weakness and tries to use that to their advantage. This would force Joker and Harley to work together in a new way to stay together and fight off the threat.

One idea could be Harley Quinn trying to break free from the Joker's control completely within the Suicide Squad setting. Maybe she starts to form real friendships with the other Squad members, like Deadshot, and they help her see that she doesn't need the Joker's madness in her life.

One idea could be that the OC is a psychologist assigned to study the Joker. As she tries to understand his mind, she gets drawn into his chaotic world. Another could be the OC is a new criminal in Gotham who catches the Joker's attention and they form an unlikely alliance against other villains. Maybe the OC has a special ability like mind - reading and the Joker wants to use it for his own gain.

A third idea is that the OC is a mental health professional who gets the chance to treat the Joker in Arkham Asylum. Through their sessions, they learn about his past traumas and how they've shaped him into the monster he is. But the OC also has to be careful not to be manipulated by the Joker, which creates a tense and psychological story.

One idea could be that the OC is a new villain in Gotham and Harley Quinn takes an immediate liking to their chaotic style. They team up to pull off a heist on one of Gotham's richest, with Harley's unpredictable nature and the OC's unique skills making for an exciting adventure.

One idea could be exploring their relationship before Harley fully embraced her criminal side. Maybe show how the Joker manipulated her in the early days. Another could be a story where they have to face a common enemy in the Suicide Squad universe that forces them to re - evaluate their relationship. Or perhaps a story where Harley starts to break free from the Joker's control and how he reacts to that.