One possible plot could be that they meet during a multiverse - related event. Maybe the Invisible Woman's powers get affected by some strange energy during a battle, and Peter Parker, with his spider - sense, is the only one who can detect her even when she's invisible. This leads to them getting closer and eventually falling in love and getting married.
In a more dramatic plot, Peter Parker could be from a different reality where he has lost all his loved ones. He travels to the Invisible Woman's universe, and she takes him in. She helps him heal and in the process, they fall in love. Despite the challenges of being from different universes, they decide to get married. Their marriage could then be a symbol of hope and unity between different parts of the multiverse, and they might face threats from those who oppose the union of different universes.
Perhaps they start off as friends who are part of a larger superhero alliance. They work together on missions, and over time, they realize that their feelings for each other are more than just friendship. Their different powers and personalities complement each other well. For example, Peter's agility and quick thinking combined with the Invisible Woman's stealth abilities make them a great team, and this teamwork evolves into a romantic relationship that ends in marriage.
One possible plot idea could be that Peter Parker meets a superfan who he ends up marrying in an unexpected turn of events. Maybe they initially bond over his superhero adventures and as they get to know each other better, love blossoms. Their relationship could then face challenges like keeping his identity a secret from the public while being in a high - profile relationship.
You can try looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a vast collection of fanfictions, and you might be able to find stories about Peter Parker and Invisible Woman getting married there.
One plot idea could be them facing a new supervillain together while also dealing with the typical married issues like who does the dishes or takes out the trash. Another could be that they're trying to keep their relationship a secret from the public eye because of all the attention it would draw.
One plot idea could be them dealing with the cultural differences between their two worlds. Peter's from the superhero world and Sam from her own fictional setting. They might struggle to understand each other's values at first but then grow closer.
A plot could revolve around them hiding their relationship from the public at first. As they get married secretly, they have to deal with the difficulties of maintaining a double life. Peter's friends in the Marvel universe and Batgirl's allies in the DC world might start to suspect something, and they have to keep their secret while also saving the world together.
Well, it could be about them balancing their superhero lives and married life. Maybe they team up to fight a new villain that threatens their city while also dealing with the everyday challenges of being married, like who does the dishes or takes out the trash.
One possible plot could be them facing a super - villain together as a married couple. They combine their powers and skills, Peter's spider - like abilities and Rocketeer's flight and weaponry skills, to defeat the bad guy.
Perhaps they decide to start a family. Then the story could focus on how Peter tries to protect his family from his enemies while still being a loving husband. There could be a lot of drama as they face threats from villains who find out about his family.
In a Peter Parker x Elsa married fanfiction, the plot could start with their accidental meeting. Maybe Peter is on a mission in a place near Arendelle and stumbles upon Elsa. They are initially wary of each other but soon realize they share a kindred spirit. As they fall in love and get married, they face many challenges. Elsa may struggle with the idea of Peter constantly putting himself in danger as Spider - Man, and Peter may find it difficult to understand the political and magical aspects of Elsa's world. But through it all, their love for each other helps them overcome these difficulties.
One possible plot could be that they have to hide their marriage from the public because of Shriek's past and Peter's secret identity. They face challenges in keeping their relationship a secret while also dealing with super - villain threats.