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.
One idea could be that Naruto and Captain Marvel are brought together by a powerful cosmic force. They have to combine their unique abilities, Naruto's ninja skills and Captain Marvel's superpowers, to defeat a common enemy that threatens both their worlds. For example, a powerful alien race that is draining chakra from Naruto's world and energy from Captain Marvel's universe.
One possible plot could be that they are brought together to fight a powerful new enemy. During the battles and strategizing, they start to develop feelings for each other. Peter's quick thinking and Captain Marvel's raw power complement each other, and they realize they are stronger together not just as superheroes but also as a couple.
What if the powers of Captain America and Captain Marvel get swapped? Captain America suddenly has to deal with the overwhelming cosmic powers while Captain Marvel has to rely on her combat skills and leadership on the ground. This forces them to see the world from each other's perspective and also creates a whole new set of challenges as they continue their mission.
A different plot could be set in a post - Endgame world. Valkyrie is ruling Asgard and Captain Marvel is still out in space protecting galaxies. One day, a strange energy signal draws Captain Marvel to Asgard. Valkyrie is initially cautious but soon realizes they can work together to figure out the source of the signal. As they work together, they discover new aspects of each other and their relationship blossoms against the backdrop of a rebuilding Asgard and a changing universe.
Another idea is that there's a sort of multiverse crisis that causes parts of the Naruto and Marvel universes to merge. Naruto and Domino find themselves in the middle of this chaos. They have to work together to figure out what's causing the merge and how to stop it. Along the way, they encounter other characters from both universes. Naruto might teach some of the Marvel heroes about chakra and how to use it in combat, while Domino shows Naruto how to better utilize strategy in battles against opponents with unpredictable powers.
A possible plot could be that an ancient artifact has been stolen and it has the power to disrupt the balance between Earth and Asgard. Captain Marvel and Valkyrie are both called upon to retrieve it. They initially suspect each other of having ulterior motives but soon realize they are on the same side. They then embark on a journey filled with battles against various intergalactic pirates and magical creatures who also want the artifact for themselves.
The plot might involve an interdimensional force that accidentally merges the worlds of Spider - Man and Captain Marvel in a way that forces them into a shared adventure. They could be in a situation where they have to protect a group of innocent people caught in this strange merge. Since they are from different hero backgrounds, they initially clash but then gradually learn to work together as they face greater threats.
One possibility could be that Captain Marvel is somehow pulled into the Young Justice universe. Maybe there's a threat that only their combined powers can stop. Captain Marvel's vast cosmic powers and the unique skills of the Young Justice team members like Robin, Superboy, and Miss Martian could make for an exciting adventure as they learn to work together.
One possible plot could be that the Avengers are facing an extremely powerful new enemy that they can't seem to defeat. Captain Marvel arrives on Earth just in time. At first, there are some misunderstandings and clashes of egos among the Avengers and Captain Marvel. But as they start to work together, they realize each other's strengths. Captain Marvel's raw power combined with the Avengers' teamwork strategies slowly turn the tide of the battle. Eventually, they defeat the enemy and Captain Marvel decides to stay on Earth for a while to help the Avengers train for future threats.
Well, one possible plot could be that there's some sort of misunderstanding between Captain Marvel and Young Justice. Maybe Captain Marvel is on a mission that Young Justice unknowingly interferes with. They could start fighting, but then realize they're on the same side when a greater threat emerges. For example, a powerful alien force arrives and they have to team up to defeat it.