Perhaps they are on a mission together in a far - off dimension where there's some sort of magic or strange technology that causes Ms Marvel to become pregnant. This could lead to a story about them trying to find a way to reverse it while also protecting the dimension from an emerging threat.
One idea could be that they are part of a multiverse experiment gone wrong which results in an unexpected pregnancy. They then have to deal with the reactions from their superhero friends and family.
One idea could be a time - travel fanfic. Spiderman and Ms Marvel accidentally get sent back in time and have to find a way to get back to their own time while also not disrupting the past too much. They could meet younger versions of other superheroes and have some really interesting interactions.
One idea could be that they team up to face a new super - villain who has the power to manipulate time. As they work together, they start to understand each other's strengths and weaknesses better. This could lead to a deep friendship and mutual respect between them.
Make it about an alternate universe where their powers combine during a battle and create an unexpected life - form within Ms Marvel that they initially think is a pregnancy. It could be a new kind of hero or a threat they have to figure out.
A great fanfic idea would be that Spiderman and Ms Marvel have to deal with a villain who can manipulate emotions. In the story, they have to rely on their strong mental states and friendship to overcome the villain's powers. Also, a fanfic about them competing in a superhero Olympics - type event where they show off their unique skills in a friendly competition would be interesting.
A fanfiction could revolve around a spell gone wrong in the Harry Potter world that accidentally transports Ms Marvel there. She then has to navigate the wizarding world while also trying to find a way back home. Along the way, she teams up with Hermione to study the magic that brought her there and in the process, they learn from each other's worlds.
Maybe there's a story where Iron Man and Ms. Marvel team up to face a new, powerful villain who is causing chaos across the globe. They could combine their different powers and skills - Iron Man's technological prowess and Ms. Marvel's shape - shifting and energy - projection abilities - to take down the bad guy.
There are also fanfictions where their relationship develops more slowly. It might start with small acts of kindness, like Spiderman helping Ms Marvel when she's having a tough day as Kamala Khan, her civilian self. These small moments build up over time, and they gradually realize that they care for each other more than just as comrades. It's a very natural and sweet progression that many fans enjoy reading about.
They could start with a simple mutual admiration for each other's powers. Then, as they are thrown into more and more adventures together, they begin to trust each other more. For example, in a battle against a powerful enemy, Spider - Man saves Ms. Marvel from a dangerous attack, and she in turn helps him out when he's in a tight spot. This back - and - forth of saving and being saved can deepen their relationship.
One great example could be a fanfiction where they team up on a mission and gradually develop feelings for each other. In this type of story, their different powers and personalities play off each other in interesting ways. For instance, Spiderman's quick - wittedness combined with Ms Marvel's strength and determination make for an exciting dynamic.
One idea could be that Captain Marvel and Spiderman team up to fight a powerful alien threat that has invaded New York City. Spiderman uses his agility and web - slinging skills to distract the alien while Captain Marvel blasts it with her energy powers.