The plot could involve a new villain in Gotham who has a technology that can control people's minds. This villain starts to turn the citizens of Gotham against each other. Batman realizes that he needs the Joker's unique brand of chaos to break the pattern of the mind - control. The Joker, on the other hand, sees this as an opportunity to create even more mayhem. They join forces, with Batman trying to direct the Joker's actions to some extent. As they fight the villain, the Joker may come up with some out - of - the - box ideas to disable the mind - control device, while Batman focuses on protecting the innocent. But of course, their alliance is fragile, and at any moment the Joker could turn on Batman.
One possible plot could be that Gotham is being invaded by a dark magical force. Batman, with his detective skills, discovers that the source of this magic has other - dimensional origins. He then seeks out Raven, a powerful empath and half - demon, for her expertise in the magical realm. Together, they embark on a journey through Gotham's seedy underbelly and other dimensions to stop the threat. Raven uses her magic to track the source while Batman uses his combat skills and gadgets to fight off the minions of the dark force.
In a fanfiction about their first team - up, they could be brought together by a common enemy. For example, a powerful sorcerer is causing chaos in both Gotham and the world at large. Batman uses his detective skills to find clues about the sorcerer's lair, while Wonder Woman uses her combat skills and knowledge of magic to face the sorcerer directly. Their different approaches complement each other well. Batman is in awe of Wonder Woman's ability to take on the sorcerer head - on, and Wonder Woman respects Batman's strategic thinking.
Well, the plot could revolve around a situation where Kurama's life is in danger. Since Naruto and Kurama have a bond, Naruto would team up with Kurama to protect him. They could go on a journey to find a way to make Kurama stronger or to remove some sort of curse that has been placed on him. Along the way, they'd encounter other characters who might help or hinder their mission.
Well, it could be about Batman trying to stop the Flashpoint Joker from causing chaos in Gotham. Maybe the Joker has a new and devious plan that only Batman can foil.
Well, they could have an amazing adventure. 17 with his android powers and Krillin with his martial arts skills could make a great team. Maybe they'd fight some powerful villains together. They could use their combined strength to protect the Earth. 17 could use his super strength and speed, while Krillin could use his techniques like the Destructo - Disk. It would be really exciting to see how they work together and overcome challenges.
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.
One plot idea could be that the Joker is in a situation where he's being hunted by a more dangerous criminal group, and Batman, despite their long - standing enmity, saves him because he realizes the chaos that would ensue if the Joker fell into the wrong hands. Another could be that the Joker has some information vital to Gotham's safety, and Batman has to rescue him from a hostage situation to get that information. Maybe the Joker is poisoned, and Batman has to find an antidote and save him in order to also stop the spread of the poison throughout Gotham.
One possible plot could be that they team up to stop a powerful alien threat that is beyond what Supergirl can handle alone. Batman's strategic mind would be crucial in devising a plan to take down this foe. Maybe they have to find a way to combine Supergirl's superpowers with Batman's gadgets and combat skills.
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.