A great plot could be that an ancient evil threatens both Naruto's and Deku's worlds. The two are brought together by a mysterious force. At first, they struggle to understand each other's abilities and ways of life. But as they train together, they learn to complement each other. Naruto teaches Deku some of his ninja stealth and combat strategies, while Deku shows Naruto how to better control his strength in a more precise way like using One For All. Eventually, they form a powerful bond and are able to defeat the ancient evil.
One possible plot could be Naruto and Deku finding themselves in a strange new world together. They have to combine their unique skills, Naruto's ninjutsu and Deku's One For All power, to face the challenges of this world and find a way back home.
Well, perhaps the plot could revolve around a tournament. In this 'naruto luffy deku crossover fanfiction', they all enter a huge, multiverse - wide tournament. Naruto shows off his cool jutsu, Luffy surprises everyone with his stretching attacks, and Deku displays his newfound strength. Along the way, they have to team up against some really tough opponents who don't play fair, and they grow closer as friends.
One antagonist could be Orochimaru from Naruto's world. He could be interested in the power of Quirks in Deku's world and try to capture Deku to study his power. He would be a formidable foe as he is a master of ninjutsu and has a lot of devious plans.
Well, one possibility is that Naruto helps Tora who might be in some sort of trouble in the village. Maybe Tora got lost outside its usual territory and Naruto uses his ninja skills to find it and bring it back safely. This could lead to a new friendship where Tora starts to follow Naruto around, much to the amusement of the villagers.
One possible plot could be that Naruto, with his unwavering belief in redemption, tries to understand Madara's past grievances. He might start by finding common ground in their love for the Hidden Leaf, despite Madara's later turn against it. Naruto could use his talk - no - jutsu to gradually break down Madara's walls of hatred. They could then team up to face a new, greater threat that endangers the entire ninja world. This new threat would force them to combine their skills, Naruto's Rasengan and Madara's Susanoo for example, in unique ways to protect what they both once held dear.
The plot could start with Naruto getting into trouble for being too noisy in the village. Ibiki is assigned to keep an eye on him. At first, they don't get along. But when Naruto discovers Ibiki's love for a certain type of flower that grows on the outskirts of the village, he decides to bring some for him. This small gesture starts to break the ice between them, and they slowly become friends.
One possible plot could be that Villain Deku is on a mission to undermine the hero society and crosses paths with Hero Deku. They engage in a fierce battle where Villain Deku taunts Hero Deku about his ideals. In the end, Hero Deku manages to get through to a small part of Villain Deku's conscience, leaving him with some doubts about his villainous path.
A possible plot could be that they discover a new and dangerous jutsu that has been lost for centuries. They decide to train together to master it so that it can be used for the good of the village. Along the way, they learn more about each other's pasts and their friendship deepens.
One possible plot could be that Naruto, with his unwavering belief in friendship, manages to reach out to Obito who is still lost in his dark thoughts. Naruto shows Obito the true meaning of the village and how people can change for the better. They could then team up to fight a common enemy, like a new powerful threat to the Hidden Leaf. In the process, Obito starts to heal from his past traumas and realizes that he can still have a positive impact on the world through friendship with Naruto.
One possible plot could be that Naruto, with his unwavering belief in the good in people, manages to break through Itachi's stoic exterior. They start training together secretly. Naruto learns some of Itachi's unique jutsu and in return, he teaches Itachi about his never - give - up attitude. This newfound friendship also makes Naruto question the Leaf Village's view of Itachi, leading to a re - evaluation of the whole Uchiha massacre situation within the village.
In a fanfiction where Naruto is betrayed by his friends, it could start with jealousy. Suppose Naruto gets a great power or a special recognition. His friends, feeling overshadowed, might be tricked by an evil force into thinking Naruto is using them. So they betray him, which makes Naruto realize that he has to rely on his own strength and find new allies who truly understand him.