A plot might involve Batman investigating strange energy readings in Gotham that turn out to be related to Naruto's world. Naruto arrives in Gotham following a villain from his own world who is after some powerful technology in Batman's possession. Naruto and Batman start off at odds but as they learn more about each other's strengths and motives, they form an alliance. Naruto teaches Batman about chakra and the ninja way, while Batman shows Naruto how to use stealth and technology in a more urban environment.
Perhaps there's a threat that endangers both Naruto's world and Gotham. A powerful enemy is creating portals between the two worlds and causing destruction in both. Naruto and Batman meet in the middle of this chaos. Batman is intrigued by Naruto's ability to never give up, and Naruto is in awe of Batman's intelligence and determination. They combine their forces, with Naruto using his Rasengan and shadow clones, and Batman using his batarangs and the Batmobile, to close the portals and defeat the common enemy.
One possible plot could be that Voldemort's dark magic starts to seep into Gotham City. Batman, being the detective he is, starts to notice strange and magical happenings. Meanwhile, Harry Potter, Ron and Hermione get transported to Gotham through a magical accident. They team up with Batman to stop Voldemort's influence from spreading further. Harry uses his magic skills and Batman uses his gadgets and combat skills to take on the Death Eaters and Gotham's villains who have been corrupted by the dark magic.
Perhaps in the 'naruto x batman fanfic', there's a threat that endangers both the Naruto world and Gotham at the same time. A powerful interdimensional villain is causing chaos. Naruto and Batman meet in a neutral dimension and have to quickly learn to trust each other. Naruto teaches Batman about chakra control to enhance his combat skills, while Batman shows Naruto how to use gadgets and strategic thinking to outwit their enemy.
Maybe in this fanfiction, the gamer aspect brings in a system of quests to the Naruto world. Naruto has to complete various quests around the Hidden Leaf Village, like helping villagers with their daily problems or finding rare items. These quests could reward him with new jutsu or power - ups. It would be like he's living in a real - life RPG, which would add a whole new layer of adventure to the Naruto universe.
One possible plot could be that Naruto and his friends from the Naruto universe are suddenly transported to the Destiny universe. They could be mistaken for new Guardians at the Tower. Naruto's chakra abilities might be misinterpreted as a new form of Light power. They then have to team up with Destiny's Guardians to fight against a common enemy that threatens both universes, like a powerful Darkness entity that has somehow found a way to cross over from Naruto's world where the Akatsuki's actions have weakened the barriers between worlds.
One interesting plot could be that Ichigo and Naruto are brought together in a strange alternate dimension. In this dimension, they have to team up to fight a new common enemy that has powers combining the Hollow and the Nine - Tails. They start off not understanding each other's abilities but gradually learn and combine their powers in unique ways to defeat the enemy.
One possible plot could be that Naruto, through some strange space - time rift, ends up in Kaguya's era. He could then team up with her against a common enemy that threatens both their worlds. Naruto's unique jutsu and his never - give - up attitude might inspire Kaguya, and together they could create new and powerful techniques.
One possible plot could be Naruto and his friends being summoned to the world of For Honor. Naruto, with his ninja skills, could team up with the samurai and Vikings in For Honor. He might teach them some of his unique jutsu, like the Shadow Clone Jutsu to create diversions in battles. And in return, he could learn the combat styles of the For Honor warriors. They could then face a common enemy that threatens both the ninja world and the For Honor world.
One possible plot could be that Tenten discovers a hidden jutsu in an ancient scroll that was once used by Naruto's clan. This jutsu has the power to create portals to different dimensions. Naruto, being curious and always up for an adventure, teams up with Tenten to explore these new dimensions. Along the way, they face various challenges and enemies, and also learn more about each other's skills and pasts.
One interesting plot could be that Naruto is somehow transported to the DC universe. He teams up with Superman. Naruto's chakra and his ninja skills like shadow clones could be used in unique ways to fight villains. For example, the shadow clones could be used to distract enemies while Superman delivers a powerful blow. It would be a clash of two very different power systems and cultures.
One interesting plot could be that Naruto and his friends are transported to the Pokemon world. Naruto, with his determination and ninja skills, decides to become a Pokemon trainer. He might choose a Pikachu as his first Pokemon because of its spunk, similar to his own. Along the way, he discovers that some of the Pokemon have chakra-like abilities and he tries to use his ninja knowledge to train them in new ways. His friends also each choose their own Pokemon and they compete in Pokemon battles while also trying to find a way back to their own world.