Perhaps a fanfiction could focus on how the events in the Land of Waves affected the economy and the daily lives of the people there. Naruto could witness the struggles of the villagers and come up with a plan to help them, using his unique perspective as an outsider. This would not only show his growth as a character but also give a different view of the Land of Waves.
Another plot could be a time - travel fanfic where Naruto and his friends are sent back in time to the events that led to the Land of Waves' situation in the first place. They then have to figure out how to change things for the better without changing the future too much.
One idea could be Naruto getting lost in the Land of Snow and having to team up with local shinobi to find his way back. He could learn about their unique ice - based jutsus during the adventure.
A plot could revolve around a new villain emerging from the Land of Demons. This villain has a special connection to Naruto's past, and Naruto must face his own inner demons as well as the external threat to save the Land of Demons and his own world. The story could explore themes of redemption and self - discovery.
One idea could be exploring the lost history and secrets of the Land of Whirlpool. Maybe the main character discovers an ancient jutsu that was once unique to the land. Another could be a story about a character trying to revive the glory of the Land of Whirlpool after it has been in decline.
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.
Perhaps a fanfiction where a group of humans from our world accidentally get transported to the land of the giants. They have to quickly learn how to survive and communicate with the giants, while also trying to find a way back home. They could form alliances with some of the more friendly giants and face off against the hostile ones.
The feudal lord could be secretly training as a ninja himself. He wants to better understand the world of the ninja and be able to protect himself without relying solely on his guards. This would add an element of mystery as he has to keep it a secret from his court.
Perhaps a story about a forbidden love between two different species in the land beyond time. It would be a complex relationship as they might face opposition from their own kind due to cultural or biological differences. This could lead to a journey of self - discovery for the characters and also a test of whether love can truly conquer all in such a strange and magical land.
Perhaps there could be a magical element in the fanfiction that causes the transformation. A strange comet passes by and its energy alters the DNA of the dinosaurs. As a result, they start to transform into hybrids of different species. This would lead to a lot of confusion and also new opportunities for cooperation and conflict among them.
Perhaps a story where a human character discovers a hidden power within themselves in this 'land of milk and honey'. This power could be related to the magic or mystery that already exists in the Twilight universe and change the dynamics between humans and vampires.