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 idea could be that Harley tries to hide her pregnancy from Joker at first because she's not sure how he'll react. Another could be that they go on a wild adventure while Harley is pregnant, facing various villains who either try to use her condition against them or are unexpectedly helpful. Or perhaps there's a plot where Harley has to deal with her own insecurities about becoming a mother while still being in a relationship with the unpredictable Joker.

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 idea could be that Harley Quinn and Joker have a baby, and the baby inherits their chaotic and unpredictable nature. Maybe the baby starts causing mayhem in Gotham from a very young age, and the other villains and heroes are all shocked and don't know how to deal with this new situation.

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.

For a joker and harley lemon fanfiction, you could write a story where they get lost in a magical forest. In this forest, they have to face their inner demons together. Harley could use her charm and wits to help Joker deal with his insecurities, and in the process, their relationship deepens. You could also explore a scenario where Joker is injured and Harley has to take care of him. This would show a different side of their relationship, a more tender side. Additionally, a story about them stealing a precious artifact from a powerful villain and how they celebrate their victory with some passionate moments could be interesting.

Another plot could be a role - reversal. The Joker gets hit by some strange gas that makes him lose his 'evil' side for a while. Harley then has to deal with a very different Joker, and she starts to miss the old him in some ways while also enjoying this new side of him. It could be a story of self - discovery for both of them.

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.