Another plot point could be the reaction of their respective friends and families. Peter Parker's Aunt May might be a bit worried at first about him marrying someone so different and powerful. Meanwhile, Carol's friends in space might be skeptical about her tying herself to an Earth - based hero. How they deal with these reactions and gain acceptance from their loved ones could be a big part of the fanfiction. Also, they could face a supervillain who wants to use their relationship to gain power, forcing them to work together in a new way as a married couple.
One interesting plot point could be the cultural differences. Spider - Man is from New York, a very earth - bound and human - centered culture, while Carol has been out in space and among different alien cultures. Their marriage could involve them learning about each other's cultures and how to blend them. For example, at their wedding, they might incorporate both Earth - based traditions and some cosmic - themed elements.
One idea could be that Percy and Carol are brought together by a cosmic event. Maybe a powerful artifact from Percy's world has been lost in the cosmos and Carol, while on a space mission, stumbles upon it. This leads to them having to work together to figure out how to return it safely. Another could be a crossover where the gods from Percy's world are threatened by an intergalactic force, and Carol is called in to help. She has to learn to work with Percy and his demigod friends to fight this new threat.
In a fanfiction of their marriage, perhaps it starts with Spider - Man being in awe of Carol Danvers' abilities. She, on the other hand, is intrigued by his tenacity. They go on a series of missions together where they gradually fall in love. When they decide to get married, it's not without challenges. There could be villains who try to stop the wedding because they fear the combined power of the two heroes. But with the help of their friends, they overcome all obstacles and have a beautiful wedding, vowing to protect each other and the world always.
A Carol Danvers and Spider - Man crossover would also be cool. Peter Parker's street - level heroics combined with Carol's intergalactic adventures could create a really unique story. Maybe Spider - Man helps Carol understand the importance of the little guy while she shows him the vastness of the universe.
A plot could revolve around a time - traveling device. Carol Danvers accidentally activates it and is sent back in time to when Mar - Vell was at the peak of his heroics. They form an unexpected bond as they work together to stop a time - altering villain. Or perhaps there's a story where Mar - Vell's powers start to manifest in Carol in a strange way, and she has to figure out how to control them with the help of Mar - Vell's spirit or memories.
Maybe they are both attending a superhero conference on an alien planet. There's a mystery to solve about some missing technology. Peter's street - smart thinking combined with Carol's powerful abilities help them in the investigation. During this time, they start to have feelings for each other and there are some cute, awkward moments between them.
One possible plot could be that Carol Danvers accidentally travels to the wizarding world of Harry Potter. She might initially be confused by the magic there, but then use her own superhuman abilities in unique ways. For example, she could use her flight to compete in a Quidditch match in a very unorthodox style. And her super strength could come in handy when dealing with dark creatures.
A possible plot could be that they meet during a major inter - dimensional crisis. They initially clash due to their different approaches but gradually fall in love. After some time, they decide to get married in a secret ceremony to avoid media frenzy. Their married life then becomes a struggle to balance their superhero duties and their relationship.
A great plot could be a story where Peter and Carol have to mentor a new group of young superheroes. They could have different teaching styles - Peter being more relatable and street - smart, while Carol is more about discipline and using one's full potential. This could lead to some interesting clashes and also moments of great teamwork as they guide the young heroes through various challenges.
One interesting storyline could be Percy and Carol teaming up to fight a powerful, otherworldly threat that neither could face alone. Maybe a new type of monster that has the ability to manipulate time, and Percy's skills in combat and knowledge of Greek mythology combined with Carol's superhuman strength and flight abilities are needed to defeat it.
One idea could be that they meet during a big superhero event where they have to team up. As they work together, they start to realize they have a lot in common beyond their superhero duties. This leads to a friendship that gradually turns into love. Eventually, they decide to get married in a ceremony attended by all their superhero friends, with Iron Man as Peter's best man and Captain Marvel's friend Maria Rambeau as her maid of honor.