One possible plot could be that they have to face opposition from their respective superhero communities. Some might think that their union could create a power imbalance or that it goes against the unwritten rules of superhero relationships. But they decide to prove everyone wrong by using their combined powers for the greater good, like saving the world from a new and extremely powerful villain that neither could defeat alone.
In this fanfiction, the plot could revolve around their different cultures. Superman is from Krypton and Wonder Woman is from Themyscira. They could struggle to combine their cultural traditions in their marriage. For example, Superman's Kryptonian family may have certain expectations, and Wonder Woman's Amazonian sisters might have their own opinions. But through love and understanding, they find a way to blend the two cultures and create a new and unique family structure. Also, they team up to stop an alien invasion that is targeting both Kryptonians and Amazons, showing that their union is not only about love but also about uniting two powerful forces for the protection of the universe.
The plot might involve them having a secret wedding at first. They keep it a secret because they want to enjoy a normal relationship for a while without the media frenzy. However, as time passes, they realize that they can't keep it hidden forever. Meanwhile, they are also dealing with an ancient prophecy that says their union will either bring great peace or great destruction. So they have to figure out how to make their relationship work in a way that ensures the positive outcome of the prophecy.
Well, the plot might start with Peter Parker accidentally traveling to the DC universe. There, he meets Wonder Woman. At first, they're at odds because of their different ways of doing things. But as time passes, they realize they have a lot in common, like their sense of justice. They go through many adventures together, and their relationship blossoms. When they decide to get married, they face opposition from some villains who don't want to see two powerful heroes united. But they overcome all the obstacles and have a beautiful wedding.
The plot could involve an alternate universe where the rules are a bit different. Superman and Wonder Woman are not as restricted by their normal moral codes. In this lemon fanfiction, they could start a relationship that is more passionate and free - spirited. They might explore new powers together, and their relationship could be a source of strength for them against the villains in this universe. For example, they could combine their powers in a new way while also having a romantic relationship full of love and desire.
Perhaps it could begin with Superman and Wonder Woman being in a secret relationship. As they explore their feelings for each other, an unexpected pregnancy occurs. This then sets off a chain of events. They have to keep it a secret from the public at first, but as Wonder Woman's pregnancy progresses, it becomes harder to hide. There could be internal conflicts within themselves about their roles as parents and superheroes. Also, external threats would emerge. Villains might sense the power of the unborn child and try to manipulate the situation for their own gain. The story could end with them either triumphing over the threats and welcoming their child into a new, more united superhero world, or facing a tragic end where they lose the child and have to reevaluate their relationship and lives.
Another idea is that they get married as part of a strategic alliance to fight a greater threat. This threat could be something that neither of them could face alone, like a powerful interdimensional villain. Their marriage then becomes a symbol of hope for the entire DC universe, inspiring other heroes to work together more closely.
Maybe in the fanfiction, they are brought together by a common enemy who is a threat to both their worlds. As they team up, they discover they have more in common than they thought. Wonder Woman is impressed by Spiderman's sense of responsibility and his ability to always keep fighting no matter the odds. Spiderman is in awe of Wonder Woman's strength and grace. Their relationship develops, and they decide to get married. After marriage, they balance their personal lives and hero duties, and their union brings a new era of peace and cooperation between their respective hero communities.
A plot could involve a situation where there is a misunderstanding between the two. Superman thinks Wonder Woman is being too reckless in her actions, while Wonder Woman believes Superman is being overly cautious. But as they face a powerful villain who is causing chaos, they realize they need to put aside their differences. Through this process, they learn to respect each other's methods more and become closer friends.
In a married fanfiction, a big challenge for them could be jealousy. Given their popularity and the fact that they are constantly interacting with other superheroes, there could be instances of jealousy. For example, Superman might get jealous if Wonder Woman spends a lot of time with Batman on a mission. And Wonder Woman could feel the same if Superman has a close friendship with Lois Lane. Additionally, they would have to deal with villains who might target them specifically because of their relationship, seeing it as a way to weaken them both.
In this fanfiction, their powers could combine in amazing ways. Superman's super strength and flight, along with Wonder Woman's combat skills and magic lasso, could create a new form of defense for the world. For example, when facing a powerful enemy, Superman could hold the enemy in place with his strength while Wonder Woman uses her lasso to extract the truth about the enemy's plans. Their combined powers would be a force to be reckoned with, protecting not only each other but also the entire planet.
A possible plot could be that they discover the pregnancy during a battle. Maybe some sort of alien energy affects them both, and they soon realize they're going to have a baby. Then they have to hide it from their enemies who might see it as a weakness. They'd also need to figure out how to combine their different powers and heritages to ensure a healthy pregnancy and birth.
In a 'Wonder Woman meets Superman' fanfiction, they might team up to fight a powerful common enemy. For example, a super - villain from another dimension could threaten Earth, and their combined strength and different abilities would be needed to save the day.