A third plot could be that the baby is kidnapped. This forces the Joker and Harley to put aside their differences and work together in a more serious way than they ever have before. They embark on a wild adventure to rescue their baby, facing all sorts of challenges and enemies along the way.
One interesting plot could be the Joker and Harley trying to raise their baby in a world that is constantly against them. Maybe they have to protect the baby from other villains who want to use it for their own gains.
Another plot might involve the baby having some sort of special power. Harley and the Joker then have to figure out how to handle this while also dealing with their own chaotic relationship. For example, the baby's power could attract unwanted attention from superheroes or super - villains alike, and they have to keep it a secret.
One idea could be that the baby has the Joker's chaotic nature but Harley's charm. For example, the baby might play pranks on the henchmen in a really cute yet mischievous way. Another could be that the baby has some special powers, like being able to make people laugh uncontrollably just like the Joker, but also has Harley's acrobatic skills at a very young age. Maybe the baby could be the key to a new, more 'family - oriented' life for the Joker and Harley, leading them to try and reform for the sake of their child.
Another plot might involve the Joker facing a new rival in the criminal underworld, and Harley Quinn has to choose between staying loyal to the Joker or making her own path. This could lead to a lot of drama and action, like Harley using her acrobatic skills and unique weapons to fight the new threat while dealing with her feelings for the Joker.
One interesting plot could be Harley trying to break free from the Joker's toxic influence and find her own identity. In some fanfictions, she realizes that his so - called 'love' is actually just a form of control. Another plot might be them having a moment of true understanding where the Joker actually shows a vulnerable side to Harley, changing their dynamic in a new way.
One interesting plot could be the chaos that ensues when Harley discovers she's pregnant. Maybe she tries to reform Joker into a more family - friendly person. Another could be the reaction of Gotham's villains and heroes to the news. For example, Batman might be conflicted on how to deal with a pregnant Harley who is still associated with the Joker.
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.
There are fanfictions that re - imagine their relationship in a different setting, like in a post - apocalyptic Gotham. In some, Harley uses her psychiatric knowledge to try and 'cure' the Joker of his madness, which makes for a really engaging read. Also, there are those that delve into their backstories more deeply, showing how they became the characters we know today.
One interesting joker and harley fanfiction could be about their origin story from a different perspective. Maybe it shows how Harley was initially drawn to the Joker in a more psychological depth. Another could be a story where they try to live a normal life away from crime, which would be a huge twist considering their usual chaotic nature.
Well, the fanfiction could start with Harley Quinn finding out she's pregnant. The Joker is shocked at first but then decides to keep the baby as part of his 'grand plan'. As the baby grows, they have to deal with raising it in their chaotic world. Harley tries to give the baby a normal life as much as possible, while the Joker is constantly getting into trouble that puts the family in danger. It could also explore how the baby affects their relationship, whether it brings them closer or drives them further apart.
In addition to the Joker, Harley, and their baby, there could also be other characters from the DC universe making appearances. For instance, Batman might show up as he is always on the lookout for the Joker's misdeeds. He could be a threat to the family unit in the fanfiction, or perhaps an unexpected ally in some situations. Also, other villains like Poison Ivy, who is Harley's friend, could play a role. Maybe she helps Harley take care of the baby or gives advice on how to deal with the Joker's wild behavior.
The relationship might become more complex. Harley would likely be more protective and demand more stability from the Joker for the sake of the baby.