If the Joker is captured by Batman in the fanfic, Batman could use this opportunity to study the Joker more closely. He might try to understand what really makes the Joker tick, his origin, and his motives in a deeper way. However, the Joker might be planning an escape even while being held captive. He could be using his time in captivity to set up a grander scheme that would put Gotham in even more danger once he breaks free, all while constantly playing mind games with Batman.
In a fanfic where Batman joins the Joker, it could lead to a really strange and dark alliance. Maybe Batman is trying to understand the Joker's madness from the inside. He might pretend to be on the Joker's side to stop a greater evil that only the Joker seems to know about.
If Batman becomes Joker in fanfiction, Gotham would be in chaos. Batman is the symbol of justice and order, while Joker represents chaos and anarchy. Without Batman to protect the city, criminals would run wild. And as the new 'Joker', Batman might use his intelligence and skills in a very different and dangerous way, perhaps creating more harm than good.
Perhaps it's due to a psychological breakdown. Batman has endured so much trauma over the years. The constant fight against crime, the loss of loved ones, and the never - ending battle with his inner demons could all take a toll. One day, he just snaps. His mind can no longer handle the pressure, and in an attempt to escape from his own tortured self, he subconsciously adopts the persona of the Joker, as the Joker seems to have no such moral and emotional burdens.
Well, Jay might be a character who has the ability to communicate with animals. The wings could belong to a giant bat - like creature. The Joker might try to capture this creature to use its wings for his own evil deeds. Batman would then team up with Jay to stop the Joker and protect the creature.
Perhaps they would end up turning on each other in the end. Even if they start working together, their fundamental differences would still exist. Batman's moral code would constantly clash with Joker's lack of it. So, after achieving a common short - term goal like taking down a more powerful villain or organization, they would likely go back to their usual enmity.
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 common theme is the duality of good and evil. Batman represents order and justice, while the Joker represents chaos. Fanfics often explore how these two opposing forces are intertwined. For example, some stories show how Batman's strict moral code can sometimes lead to unforeseen consequences, and how the Joker's chaos can have a strange kind of logic to it.
The idea of insanity versus sanity is also prevalent. Joker's madness is contrasted with Batman's rationality, and many fanfics play around with how these two states can sometimes seem to blend or be misinterpreted. For example, in some fanfics, Batman might be pushed to the edge of his sanity by Joker's actions. Another common theme is the concept of redemption. Some fanfics might explore the possibility of Joker being redeemed, or Batman losing his way and having to find his own redemption. This adds a layer of depth to the characters and their relationship. It also makes the readers think about the nature of heroism and villainy in different ways.
In such a fanfic, Naruto might be subjected to various interrogations by Kumo. They could be interested in his Nine - Tails power. Maybe they would try to extract information about Konoha's secrets through him.
In a 'Naruto Captured by Akatsuki' fanfic, Naruto might be tortured for information about the Nine - Tails. The Akatsuki are known for their ruthless ways to extract tailed - beast power. They could try to break his spirit and make him cooperate.