First, you need to study the characters well. Know Naruto's growth, his values, and his abilities. For Captain Marvel, understand her origin, powers, and personality. Then, create a plot that makes sense for both universes to collide. For example, a rift in dimensions could bring them together. Keep the dialogue true to their characters.
Finally, don't forget about the settings. If the story takes place in the Naruto universe, describe the Hidden Villages, the forests, and the training grounds vividly. If it's in Captain Marvel's world, detail the cities and the advanced technology. Blending the two universes in a seamless way, like having Naruto use his ninjutsu in a modern city or Captain Marvel using her powers in a ninja battle, can add a lot of fun and creativity to the fanfiction.
First, know your character well. Read the official comics and watch the movies about Captain Marvel. This will help you capture her essence. Then, come up with a unique plot. It could be something that hasn't been explored much in the existing stories, like her dealing with a new type of enemy from a different dimension.
First, know both universes well. You need to understand Naruto's world of ninjas, chakra, and jutsus, as well as the Marvel universe with its superheroes and villains. Then, create a unique plot. Maybe have Naruto meet a specific Marvel character in an unexpected way. For example, Naruto could accidentally end up in Asgard. Also, keep the characters' personalities true to their original selves. If Naruto is in the story, he should still have his determination and loyalty.
One great Naruto and Captain Marvel fanfiction could be a crossover where they team up to fight a common enemy. Maybe a powerful alien that has invaded both the Naruto universe and the world Captain Marvel protects. In such a story, Naruto's ninja skills combined with Captain Marvel's superhuman abilities would make for an exciting adventure.
In a fanfiction, Naruto's Sage Mode could be combined with Captain Marvel's enhanced strength. When Naruto enters Sage Mode, his senses are heightened and his physical abilities are boosted. Captain Marvel, with her already superhuman strength, could hold back a powerful enemy while Naruto in Sage Mode uses his strategic thinking to find the enemy's weak point. Then, together, they can deliver a final, combined blow using both their enhanced physical capabilities to defeat the enemy.
One idea could be a story where Naruto is transported to the Marvel Universe and teams up with Captain Marvel. They could face a common enemy like an alien invasion that threatens both the ninja world and Earth. Naruto's unique jutsu and Captain Marvel's superpowers would make for an interesting combination in battle.
First, do your research on both Naruto and Marvel universes. Know the powers, characters, and settings well. For example, if you want to bring Naruto into the Marvel universe, think about how his ninjutsu would interact with the superpowers there. Second, create an interesting plot. Maybe a villain is trying to merge the two universes in a bad way, and Naruto and the Marvel heroes have to stop it. Third, stay true to the characters' personalities. Naruto is always positive and determined, so keep that in his interactions with Marvel characters.
There are likely some non - lemon 'Naruto and Captain Marvel' fanfictions out there. You can start by looking on popular fanfiction websites like Archive of Our Own or FanFiction.net. Search for crossovers between the two characters and then filter through the results to find ones that are appropriate in terms of content. Usually, these sites have tags and ratings that can help you identify the family - friendly ones.
One idea could be a story where Captain America and Captain Marvel team up to face a new cosmic threat that's headed towards Earth. They have to combine their unique skills, with Captain America's strategic mind and combat experience on the ground, and Captain Marvel's incredible cosmic powers in space battles.
The plot might involve Naruto being in search of a new power or a way to save his world, and he senses a powerful energy in the Marvel universe which leads him to Captain Marvel. They initially have a bit of a misunderstanding, but then realize they can learn from each other. Naruto could teach Captain Marvel about chakra and she could teach him about her advanced technology.