If Naruto becomes a Batman fan in fanfiction, he might start adopting some of Batman's strategies. For example, he could be more stealthy in his missions, much like how Batman moves in the shadows. He may also admire Batman's determination to protect his city without relying on superpowers, which could inspire Naruto to rely more on his ninja skills and intelligence rather than just his chakra.
One possibility could be that Batman, after facing one too many betrayals in Gotham, decides to take a different path. Maybe the constant struggle against crime with little real change in the city makes him cynical. He could start using his skills and resources to control the underworld instead of fighting it. For example, he might start dictating which criminals can operate and where, creating a new order that is still dark but under his command.
In a 'Naruto becomes the Batman' fanfic, Naruto might start adopting Batman's methods. He could become more stealthy and rely on his intelligence more. For example, he might use gadgets similar to Batman's utility belt, like smoke bombs or grappling hooks. Also, his approach to justice could change. Instead of his usual straightforward ninja battles, he might start planning more strategically, much like how Batman plans his crime - fighting operations in the dark alleys of Gotham.
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.
If Batman becomes a Lantern in fanfiction, he would gain the power of the Lantern ring. This could enhance his combat abilities even further. He might use the ring's energy constructs in his crime - fighting, creating things like shields or grappling hooks. His detective skills combined with the Lantern powers would make him an even more formidable force in Gotham.
The Joker could still be a major villain. Even with Batman as a god, the Joker might find some twisted way to challenge him. Maybe he'd try to drive Batman to use his god - like powers in a way that goes against his moral code. Ra's al Ghul could also be a villain. He might see Batman's new godhood as a perversion of the natural order and seek to destroy him.
There's a fanfiction that focuses on Bruce's training with different martial arts masters around the world as part of his transformation into Batman. It shows his struggles, both physical and mental, as he tries to master the skills needed to fight crime in Gotham. The story also delves into how he acquires his high - tech gadgets during this time.
In a fanfiction where Batman becomes immortal, one possibility is that he would become extremely jaded over time. He has seen so much death and destruction in Gotham, and with immortality, that would only continue indefinitely. He might start to question his own motives and methods. Also, his relationships with other characters like Alfred, Robin, and Commissioner Gordon would be strained. They would age and die while he remained, which could lead to him isolating himself from the mortal world.
In this fanfiction, Izuku could be inspired by Batman's lack of superpowers but still being a formidable hero. He may start training in more martial arts and stealth techniques, similar to Batman. And he could even create his own set of gadgets, like grappling hooks and smoke bombs, to aid him in combat and rescue missions.
One possibility could be that Naruto is drawn to boxing because of its physicality and the determination it requires. He might see it as a new way to test his strength and endurance outside of ninja battles. Maybe he starts training with a local boxing coach who sees his potential and helps him develop his skills.