Maybe there's a meta - human or a super - villain who is causing chaos in both cities. Batman is too occupied with Gotham's internal affairs, so Arrow comes to help. They discover that the villain has a base in an abandoned area between the two cities. They have to combine their resources, like Arrow's high - tech arrows and Batman's detective skills (even if Batman himself isn't directly involved but his influence on Gotham's crime - fighting is there), to take down the bad guy.
Definitely Oliver Queen and Jim Gordon. Oliver is used to operating in the shadows and taking justice into his own hands in Starling City, while Jim is a cop trying to uphold the law in the corrupt Gotham. Their different approaches to crime - fighting would make for some great interactions.
Arrow crossover fanfiction is fan - created stories that involve characters from the 'Arrow' series crossing over with characters from other shows, universes, or even different timelines within the Arrowverse. It allows fans to explore new storylines and interactions that may not have occurred in the official canon.
The plot should be engaging and make sense. It can't just be a random mash - up. A good Gotham crossover fanfiction will have a plot that ties the two (or more) universes together in a logical way. Maybe there's a common threat that forces the characters to work together, like a super - villain that exists in both universes and the characters from Gotham and the other crossover property have to find a way to stop it.
It could be amazing. Imagine Clark Kent from Smallville finding himself in the dark and gritty Gotham. He might use his powers to help Batman clean up the city in a different way. Their different moral compasses could lead to some interesting interactions, like Clark's more idealistic view clashing with Batman's darker pragmatism.
A 'Green Lantern Arrow Crossover Fanfiction' often combines the unique elements of both Green Lantern and Arrow. It might bring together their powers, like the Green Lantern's power ring and Arrow's archery skills. For example, they could team up to fight a common enemy that neither could defeat alone.
One great 'Supernatural' and 'Arrow' crossover fanfiction is 'The Hunt in Starling City'. It combines the dark, supernatural elements of 'Supernatural' with the gritty, urban setting of 'Arrow'. The story has Dean and Sam Winchester arriving in Starling City to hunt a demon that's been causing chaos in the criminal underworld, which draws the attention of Oliver Queen and his team. They initially clash but then realize they need to work together to stop the greater evil.
One great Flash and Arrow crossover fanfiction is 'The City's Heroes United'. It has a really engaging plot that combines the unique abilities and personalities of the characters from both shows. The author does a great job of making the interactions between Flash and Arrow's characters feel natural.
One possible plot could be Naruto being transported to Gotham. He might initially be confused by the dark and crime - ridden city. But with his ninja skills, he could start to fight crime in his own unique way, perhaps using his shadow clones to patrol different areas of Gotham simultaneously. His positive and determined attitude could also inspire some of the more down - trodden citizens of Gotham, like the orphans in the city.
Well, Fanfiction.net is also a great place to look for Gotham crossover fanfiction. You might find crossovers with other DC properties. Some writers like to cross Gotham with the main DC universe, creating scenarios where the Gotham version of the characters meets the more traditional comic - book versions. It adds a new layer of complexity and fun to the stories.