One idea could be that Naruto is somehow transported to Arkham Asylum. He might initially be confused by the strange new world, but his ninja skills could come in handy. For example, he could use his speed and agility to avoid the traps and villains in the asylum. Maybe he teams up with Batman, who is intrigued by Naruto's unique abilities.
A more complex fanfiction could involve all of Team RWBY in Arkham Asylum. Blake could use her stealth skills to move around unnoticed, Yang's strength would be useful in physical confrontations. They could be there because some powerful enemy has lured them there, thinking it's a place where they'll be weakened. But together with Batman and some of the inmates who might side with them (like Harley Quinn who has a complex sense of morality), they could turn the tables on the enemy.
One example could be a story where characters from RWBY end up in Batman Arkham Asylum. Maybe Ruby and her team are trying to find a way out while also encountering some of the well - known villains from the Batman universe. Another could be a crossover where Batman characters are brought to the RWBY world and have to adapt to the Grimm - filled environment.
In this fanfiction, Naruto could be a patient in Arkham Asylum. He has lost his memory and believes he is in some strange version of Konoha. The doctors at the asylum are trying to understand his 'delusions' about ninjas and chakra. Meanwhile, some of the more evil inmates sense his power and try to manipulate him for their own gain.
One great 'Batman Arkham Asylum' fanfiction is 'The Dark Knight's Redemption'. It delves deeper into Batman's psyche as he battles his inner demons while trying to escape the asylum. The author does a great job of capturing the dark and gritty atmosphere of the game.
One idea could be exploring Scarecrow's backstory in more depth. Maybe show his early days in Arkham Asylum, how he was treated by the staff and inmates, and what led him to become the terrifying Scarecrow. Another plot could involve Scarecrow creating a new and more powerful fear toxin that not only affects Batman but also the citizens of Gotham, and Batman has to race against time to find an antidote while dealing with his own fears.
In a Naruto - Batman Beyond fanfiction, perhaps there could be a crossover of technology and ninjutsu. The high - tech gadgets in Batman Beyond's world could be combined with Naruto's chakra - based abilities. For instance, a bat -arang infused with chakra for added power.
Another concept could be a fusion of their powers. What if Terry McGinnis got some of Naruto's chakra and was able to use it in his Batsuit? He could enhance his strength, speed, and agility even more. Maybe he could also use Naruto's Rasengan technique in a modified form to take down enemies. It would be really cool to see how the technology of the Batman Beyond world and Naruto's ninja abilities would interact.
Naruto's shadow clone jutsu could be really useful. He could send clones to scout out different areas of Arkham Asylum while he and Batman plan their next move. This would give them an advantage in a place full of hidden passages and threats.
First, know the source material well. Understand the characters, the setting of Arkham Asylum, and the overall mood of the game. For example, Batman is a complex character with a dark past, so make sure to capture that in your writing.
Another plot could involve a crossover with a fantasy world. Imagine Batman being transported to a world like Middle - earth. He'd have to use his gadgets and combat skills in a world full of magic and mythical creatures. He might team up with characters like Aragorn or Legolas to fight against an evil force that has some similarities to the criminals in Arkham Asylum, perhaps a dark sorcerer who is as mad and unpredictable as the Joker.