Another scenario could be that the Joker kidnaps Batman with the intention of revealing his true identity to the world. He sets up a live - stream event where he slowly peels away Batman's mask, both literally and metaphorically, by taunting him with secrets from his past.
Perhaps in the fanfiction, the Joker kidnaps Batman to prove that even the Dark Knight can be broken. He could subject Batman to psychological torture, like showing him false visions of Gotham in ruins because of his failure to stop crime completely.
One idea could be that the Joker kidnaps Batman to force him into a series of cruel 'games'. Maybe he wants Batman to choose between saving his closest allies or innocent civilians, testing his moral limits.
The Joker might try to make Batman laugh at his own jokes as a form of humiliation. He could use his trademark laughing gas in a way that forces Batman to either laugh or suffocate.
One idea could be exploring a world where Batman and Joker have to team up against a greater evil. Maybe a powerful alien force arrives in Gotham and they realize they need to combine their skills, even if reluctantly.
In some fanfiction, the Female Joker might have a different origin story than the male one. For example, she could be a victim of a corrupt system who turns to chaos as a form of revenge. This could lead to an interesting dynamic with Batman, who is always fighting for justice in a more traditional sense. Batman may struggle with whether to help her or stop her, adding depth to their relationship in the story.
One idea could be that the deaged Joker, now with a child's body but his same devious mind, tries to manipulate the younger version of Batman into believing they are friends while secretly setting up traps. Another could be that the deaged Joker's actions cause Batman to re - evaluate his own origin story and how it might be related to this new, younger - but - still - dangerous foe. Or perhaps the deaged Joker forms an alliance with other deaged villains in Gotham, creating chaos that Batman has to stop.
At first, Batman would be shocked and a bit confused. But quickly, his detective instincts would kick in. He would view the deaged Joker as a new and unexpected threat. He'd start gathering information about how the deaging occurred, in case it was part of a larger, more sinister plan. Batman would also be very careful not to underestimate the deaged Joker. He might try to isolate the Joker in a secure location to prevent him from causing chaos in Gotham. And he'd be constantly on the lookout for any signs of the Joker's old, devious self emerging from this new, younger form.
Perhaps the girl outsmarts the Joker on her own. She uses her wits to escape from the place where she was held captive and then leads the police to the Joker's hideout. So, the fanfiction ends with the girl being a hero herself.
One possible plot could be that the Joker kidnaps the girl to use her as a bargaining chip against Batman. He might think that Batman has a soft spot for this girl and would do anything to save her. So, he holds her in a secret location filled with his signature traps and chaos.
In one scenario, the Joker might kidnap Robin to taunt Batman. He could hold Robin in a secret, elaborately booby - trapped lair. Robin, being the resourceful sidekick, would try to find ways to escape and leave clues for Batman. The Joker would then play mind games with both Robin and Batman through recorded messages and false leads.
Some writers explore their relationship through a cat - and - mouse game. Batman is always chasing the Joker, and the Joker enjoys taunting Batman. It's like a never - ending dance. For example, the Joker might leave clues for Batman just to see if he can solve them, and Batman is always one step behind but determined to catch the Joker.
One idea could be that Rachel, instead of being in a typical relationship with Batman, has a series of mind - games with the Joker. The Joker tries to use Rachel to get to Batman in a more psychological way, like trying to make her question Batman's methods. Another plot could be that Rachel discovers a hidden connection between Batman and the Joker from their past, which changes her perception of both of them.