Perhaps the One Ring could have an unexpected reaction to Naruto's chakra. It could either be attracted to it or repelled. This could create an interesting plot where Naruto has to deal with the power of the Ring while also trying to find a way back to his own world.
One way it could work is by having Naruto characters in Middle - earth. For example, Naruto with his shadow clone jutsu could be a great asset in the battles against Sauron's forces. He could create clones to confuse the orcs and trolls. Meanwhile, characters from 'Lord of the Rings' could learn from Naruto's ninja skills. Frodo might pick up some stealth techniques from Naruto's training.
Well, consider Naruto's relationship with Gandalf. Gandalf would be intrigued by Naruto's chakra and his ability to perform what seems like magic without a staff or a spell book. Naruto, on the other hand, would look up to Gandalf as a wise and powerful figure. The Uchiha clan members, like Sasuke, might find kinship with the elves due to their refined skills and long - lived nature. And the interactions between the Naruto characters and the dwarves could be full of banter, as the dwarves would be amused by the strange abilities of the ninjas.
The plot could involve Naruto characters in the Middle - earth. Maybe Naruto with his shadow clone jutsu could be used in battles against orcs. For example, he could send a horde of clones to confuse the enemy. And Sasuke with his Sharingan might be able to detect the hidden threats in the dark forests of Middle - earth. It would be a really interesting mix of the two universes' combat styles and magic systems.
In this crossover fanfiction, Dracula might be a lord in Middle - earth. He rules over a land that is feared by all, but he is intrigued by the power of the One Ring. He sends his minions to find it, but they cross paths with Frodo and his companions. This leads to a series of battles and negotiations. Dracula could be tempted by the power of the Ring, but also realizes that it could bring about his own downfall if he were to claim it.
In fanfiction, Hermione could find herself in a situation where she has to deal with the One Ring. Given her strong will, she might be able to resist its power for a longer time than most. However, she would also be aware of the danger it poses and try to find a way to destroy it, perhaps using a combination of her magic and the knowledge of the lore in Middle - earth.
A really interesting plot could be that Naruto is mistaken for a powerful wizard. He gets involved in the battle against Sauron. His Rasengan could be a powerful weapon against the orcs and other dark creatures. Also, his friendship with the characters in Middle - earth would grow as they see his loyalty and determination, much like how his friends in the Naruto world value him.
Naruto himself would be really interesting. His boisterous personality and never - give - up attitude would be a contrast to the more solemn characters in 'Lord of the Rings'. He could bring a new energy to the story, and his unique jutsu would make him a force to be reckoned with in Middle - earth.
One common theme is the clash of different cultures. For example, when Middle - earth characters meet those from other fictional worlds, there are often misunderstandings at first due to different values and ways of life.
A really cool 'Lord of the Rings' crossover fanfiction is when it crosses with the DC Universe. Superman or Wonder Woman in Middle - earth would be quite a sight. They could use their powers to fight the forces of Sauron. This kind of crossover often explores how the extraordinary powers from the DC side would impact the more medieval - style world of 'Lord of the Rings'.