In some fanfictions, Naruto is brainwashed to believe he is from another village. So he starts working for their goals. This could lead to a lot of interesting interactions as he clashes with his former comrades. The story might explore how he slowly starts to remember his true identity through small flashbacks and the bonds he has with his friends.
One common plot could be Sonic being brainwashed by a powerful villain like Eggman. The villain might use some new high - tech device to control Sonic's mind. Then Sonic starts to do things that are against his friends and nature, like attacking Tails or helping Eggman steal the Chaos Emeralds. Another plot could involve an alien force brainwashing Sonic and using him to open a portal to their world for invasion purposes.
One interesting plot could be a powerful villain using a unique jutsu to brainwash Naruto himself. This would turn the tables as Naruto, usually the hero, starts acting against his friends. For example, he might try to stop Sasuke from leaving the village for the wrong reasons, but while brainwashed, he could be used to drive Sasuke further away.
One interesting plot could be that Naruto is adopted by a powerful and kind shinobi from another village. This new family could teach Naruto different jutsu and a new way of life, changing his perspective on the ninja world. For example, if he's adopted by a Waterfall Village shinobi, he might learn their unique water - based techniques.
One interesting plot could be Naruto using the Rinnegan's powers in unique ways during battles. For example, he might combine the Rasengan with the Deva Path's ability to attract and repel, creating a new and powerful attack.
One plot could be Naruto getting a mysterious illness that no one in the village can figure out. His friends, like Sakura and Sasuke, start to search for a cure. They might go on a journey to find a rare herb or seek the help of an old sage. Another could be that the illness is a result of a new enemy's jutsu. As he gets sicker, the village starts to worry about their future without their hero.
One possible plot could be Naruto going on a journey to prove his worth after being banished. He might encounter new allies and enemies, and develop new jutsu.
Well, in some Naruto gets magic fanfiction plots, Naruto might be given a magic item like a ring that allows him to communicate with spirits. These spirits could then guide him in battles and give him advice on how to defeat his foes. Another interesting plot could be that Naruto is transported to a world full of magic, and he has to adapt quickly. He might learn magic spells that enhance his speed and strength. Also, he could meet new characters who are masters of magic and they could teach him how to use magic in combination with his ninja skills.
One possible plot could be that Naruto's friends have to take on his missions while he is sick. They struggle at first because they realize how much Naruto usually does. Another could be that Naruto tries to hide his sickness from everyone, but his body keeps giving him away, like fainting during training. And a third plot might be that a new enemy takes advantage of Naruto's weakened state to attack the village.
Well, in some fanfictions, Naruto gets controlled by a mind - altering device created by a rogue scientist from another village. This device makes Naruto do things that are out of character, like stealing important ninja scrolls. His friends initially suspect he has turned bad, but then they discover the truth and have to race against time to remove the device. Also, there could be a plot where Naruto is controlled by a powerful genjutsu cast by a long - lost relative who has a vendetta against the village and wants to use Naruto as a weapon to get revenge.
One interesting plot could be that Naruto forgets all his ninja skills. His friends then have to reteach him everything from the basics. For example, Sasuke might take on the role of a strict teacher, which would be a big change in their relationship.