In some fanfictions, Naruto might get the Mangekyo Sharingan due to a connection with Sasuke. For example, Sasuke could be in a life - threatening situation and Naruto, in his desperation to save him, somehow inherits the Mangekyo Sharingan. This would lead to a whole new dynamic in their relationship, with Naruto now having a power that was once exclusive to Sasuke's clan.
One possible plotline could be Naruto unlocking the Mangekyo Sharingan through some strange and unforeseen means, perhaps a powerful jutsu backfires and gives him this new power. Then he has to struggle with controlling it while his friends are both amazed and a bit worried about this new development in him.
In a fanfic, Naruto could inherit the Sharingan from a long - lost relative. This relative could be an Uchiha who fell in love with an Uzumaki long ago. With the Sharingan, Naruto gains the ability to predict his opponents' moves more accurately. He uses this new power in combination with his Rasengan to create new and powerful jutsus, and he also has to figure out how to control the Sharingan's curse, which comes with its own set of challenges.
Another concept is the character development. The presence of the Eternal Mangekyo Sharingan often brings a deeper level of conflict and growth for the characters. They might have to struggle with the power it bestows, such as the risk of going blind or the moral implications of using its more sinister abilities.
Another plot could revolve around a character who has the Mangekyo Sharingan but is trying to hide it from both their allies and enemies. They fear the power it holds and the attention it might draw. As the story progresses, they are forced to use it in a crucial battle, and their friends then have to deal with the revelation and the potential danger it brings to the group.
One interesting plot idea could be a character from the Naruto world obtaining the Mangekyo Sharingan through some strange and unforeseen event. For example, Naruto himself could be exposed to a powerful Uchiha - related jutsu that accidentally gives him the Mangekyo Sharingan. This would completely change his power dynamic and how he approaches battles. He could then have to learn how to control this new power while still maintaining his own ninja way.
One interesting fanfiction could be about a character from Naruto who somehow gets transported to the Fairy Tail universe and has to deal with the magic there while still having their EMS powers. For example, Sasuke could end up in Magnolia and form an unlikely alliance with Natsu to fight a common enemy.
Another plot could be that the Sharingan is given to Naruto as a last - ditch effort to save the village. A dying Uchiha gives Naruto his Sharingan, and Naruto has to figure out how to incorporate it into his already powerful set of skills. He might have to deal with the jealousy or suspicion of some of his comrades who are wary of the Sharingan's power.
One possible plotline could be the main character having a unique form of the Sharingan that gives them powers beyond what is normal in the Naruto universe, like the ability to time - travel. This could lead to them changing the course of major events in the Naruto story.
One possible plotline could be Naruto suddenly gaining the Sharingan through some mysterious jutsu accident. With the Sharingan, he could quickly learn new techniques and have enhanced perception. Combined with the Kyuubi's power, he might become an almost unbeatable force. For example, he could use the Sharingan to better control the Kyuubi's chakra flow, making his attacks more precise and powerful.
One interesting storyline could be Naruto discovers he has Sharingan after a strange encounter with an ancient Uchiha artifact. This new power makes his enemies question his identity and alliances, and he has to struggle with the newfound power while still being true to his ninja way.
One possible plotline could be Naruto forming a unique bond with Chomei. Maybe Chomei helps Naruto in a difficult battle by using its special abilities, like its ability to manipulate the nano - sized insects. This could give Naruto an edge against a powerful enemy.