You could write about how the relationships between characters change in this new land. For example, Naruto and Sasuke might have a different dynamic as they face new challenges together. Also, new characters native to the New Land could be introduced, with their own unique cultures and abilities that interact with the existing Naruto world in interesting ways.
You can also start by doing some research on existing Naruto lore. This will help you to create a more believable and engaging 'Naruto New Land Fanfiction'. For instance, look at how the different villages in the Naruto world are structured and run. Then, you can base the New Land's society on similar or contrasting principles. Maybe the New Land has a more egalitarian society compared to the hierarchical Hidden Villages. After that, just start writing and let your ideas flow. Don't worry too much about making it perfect at first; you can always go back and edit later.
It could be about a whole new adventure in the Naruto universe. Maybe it focuses on the unique aspects of the Land of Claws and the Land of Fangs. It might involve new characters native to those lands, or perhaps some sort of conflict that Naruto and his friends have to face there.
A young girl who is an expert in water - based ninjutsu but was self - taught because she had no proper teacher in the Land of Waves. She could join Naruto's team temporarily and teach them some unique water - related techniques.
One possible fanfiction could be about the characters in 'The Land Before Time' discovering a new field of magical flowers. These flowers could have special powers, like the ability to heal any injury. The young dinosaurs might be initially scared but then realize the flowers' potential and use them to help an older, injured dinosaur in their group.
He might meet a powerful demon king who initially sees Naruto as an intruder but later realizes his good intentions. There could also be a young demon who is curious about Naruto and helps him navigate the land.
One possible fanfiction could be about the feudal lord's role in maintaining peace during a time of political unrest in the Land of Fire. Maybe he has to deal with various ninja clans vying for power and uses his diplomatic skills to keep the balance.
Naruto is obviously a common character. He often visits the Land of Iron or gets involved in events related to it. Sasuke might also be there, as his journey often intersects with Naruto's. Then there are the samurai from the Land of Iron, like Mifune. He is a respected figure and could play a major role in fanfictions set in the Land of Iron.