The plot could involve a new villain who targets both of them because of their relationship. This villain might be someone who wants to disrupt the harmony between Earth and the cosmos. Spider - Man and Captain Marvel have to work together to defeat this enemy while also dealing with the challenges of their new - found married life.
Perhaps they discover a new power that emerges when they are together as a married couple. This power could be crucial in saving the multiverse from a great threat. The fanfic could then be about their journey to understand and master this power, all while maintaining their relationship and dealing with the public eye as a married superhero couple.
One possibility in such a fanfic could be that they meet during a major inter - galactic crisis. Maybe they start off as allies, gradually realizing they have deep feelings for each other. Their different powers could combine in interesting ways to save the day, and this shared experience could be the start of their romantic journey towards marriage.
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.
In a fanfiction like this, there could be a lot of challenges. Their different backgrounds - Peter Parker's normal life as a student and Carol Danvers' military - turned - superhero past - could create some interesting conflicts. But they could also learn from each other. Spider - Man could teach Captain Marvel about the little joys of a normal life, and she could show him how to be more confident in the big superhero world.
One possible fanfiction could involve Spider - Man and Captain Marvel teaming up during the Endgame battle. Maybe Spider - Man uses his agility to distract the enemy while Captain Marvel blasts them with her powerful energy. They could also have some fun banter, like Spider - Man making a joke about how Captain Marvel can fly and he has to swing around.
A great fanfic might involve a scenario where Spider - Man gets transported to a different dimension where Captain Marvel is in trouble. He has to use his wits and skills to help her out. Their relationship could start as a bit of a rocky partnership but grow into a strong friendship as they face challenges together. In this fanfic, there could be some really cool action scenes with Spider - Man swinging around while Captain Marvel is flying and blasting enemies.
One plot idea could be that they meet in an alternate dimension where they are the only ones who can save that world. During their adventure, they fall in love and decide to get married. But when they return to their own world, they have to deal with the reactions of their friends and the public.
Imagine in the fanfiction, Spider - Man discovers a new ability during Endgame that can complement Captain Marvel's power. He shares this with her, and they experiment with combining their powers in new ways. For instance, Spider - Man could create a web - like energy field using his new ability, and Captain Marvel could charge it with her cosmic energy to create a powerful shield or weapon against the enemy.
There have been instances where Spider-Man and Captain Marvel have squared off in the comics. It usually depends on the circumstances and the overall narrative of the comic series.
You can try websites like Archive of Our Own (AO3). It has a large collection of fan - made stories, including many 'Captain Marvel x Spider - Man' fanfics. The site is well - organized, and you can easily search for the specific pairing you're interested in.
The plot could start with Artemis being sent to the modern world as a punishment or a mission. Spider - Man crosses paths with her and is intrigued. As they get to know each other, they find that they share a common goal of protecting the innocent. They get married, and then they have to deal with the jealousy of some of Spider - Man's enemies and Artemis's siblings from Greek mythology. They must use their combined skills to overcome these obstacles and prove that their love and union are strong.