One way Peter Parker could become a Batman fan is through multiverse exploration. Maybe in a world where the heroes' stories are more intertwined, Peter discovers Batman's methods of crime - fighting. His detective skills and use of gadgets might intrigue Peter, who is used to more physical powers like his spider - abilities.
Perhaps Peter Parker attends a superhero symposium where they discuss different hero archetypes. There, he hears in - depth analysis of Batman's character. Batman's unwavering dedication to protecting Gotham, despite the odds and his own personal tragedies, could inspire Peter. He may then become a huge fan, even incorporating some of Batman's tactics into his own crime - fighting in New York.
One possibility could be that Peter Parker, in a moment of extreme stress and anger, is exposed to the Carnage symbiote. Maybe he's facing a great loss, like the death of a loved one, and his emotions make him a prime target for the symbiote's takeover. The Carnage symbiote, known for latching onto negative emotions, might sense his turmoil and bond with him, thus leading to his transformation into a form influenced by Carnage.
Well, if Peter Parker becomes Flash in fanfiction, he might use his new super - speed in really interesting ways. For example, he could swing between buildings as Spider - Man even faster. Maybe he'd combine his spider - sense with the Flash's ability to see things in slow motion, making him an even more formidable hero. He could also use the Flash's speed to create new web - slinging techniques, like using his speed to make the webs shoot out faster and farther.
His costume could potentially change. He might add some darker elements or more gadgets inspired by Batman. He could also start to use his intelligence in a more detective - like way, setting up surveillance around the city to anticipate crime, rather than just waiting for his spider - sense to tingle. This new - found admiration for Batman could make him a more serious and calculated hero.
Well, it could happen if Percy somehow got exposed to Batman comics or movies in the demigod world. Maybe Annabeth introduced him to it, thinking it would be a good strategic read. After all, Batman is known for his brilliant mind and strategic planning, skills that could be useful for Percy in his own battles.
One way could be that Tony Stark, before his death, saw something special in Peter. Maybe he left a will stating that Peter, being a brilliant and morally upright young hero, would inherit Stark Industries. It could also be that in the post - Endgame world, the remaining Avengers decided that Peter was the best choice to carry on Tony's legacy in terms of the company, given his connection to Tony and his own scientific acumen.
One possible plot could be that Peter Parker, while exploring different dimensions or during some strange experiment gone wrong, discovers the existence of Savitar. Intrigued by Savitar's speed and power, he starts to study him. This could lead to Peter trying to incorporate some of Savitar's abilities into his own fighting style, creating a new and more powerful Spider - Man. He might face opposition from his friends who worry about him delving into such dangerous territory.
Peter might get invited to the Avengers' headquarters. There, he could see all their cool gadgets and technology. He would be like a kid in a candy store. The Avengers could ask him for advice on how to deal with street - level threats, since he has more experience in that area. Peter would be really happy to contribute and feel like he's part of the team.
In such a fanfiction, Peter might lose his usual control. He could accidentally reveal his identity while drunk. For example, he might start talking about his Spider - Man adventures without realizing it.
In a 'Peter Parker meets Shuri' fanfiction, they could team up to fight a common enemy. Maybe a new super - villain emerges in both their worlds and they combine their unique skills. Peter with his spider - abilities and Shuri with her brilliant Wakandan technology.
Well, he might become extremely powerful. He could use the power of the gauntlet to protect his city in ways he never could before. Maybe he could even defeat the most powerful villains with a single snap.