Well, it could start with Spiderman being transported to Diana Prince's world. His scientific knowledge from his own world could be a new aspect in her world. Diana, with her wisdom and experience, could teach Spiderman about her culture and way of life. Their powers would blend in that they could cover different aspects of combat. Spiderman's ability to sense danger could work in tandem with Diana's battle instincts.
One way could be through a powerful external force or event. Maybe a threat to all of existence that requires both Spiderman's heroism and Lady Death's connection to the afterlife to be resolved. This would force their two worlds to come together as they work towards a common goal.
Well, Spiderman has his web - slinging and enhanced agility, while Storm can control the weather. In the fanfiction, they could combine their powers when facing villains. For example, Spiderman could use his webs to swing around in the strong winds Storm creates, reaching enemies faster. Or Storm could create a lightning storm, and Spiderman could use his webs as conductors to direct the lightning towards the bad guys. This would make them a really powerful duo in the story.
The challenges would be numerous. Firstly, their powers operate on different levels. Spiderman has relatively more 'human - scale' powers compared to Diana's god - like abilities. This could lead to insecurities or over - protectiveness. Secondly, their social circles are very different. Spiderman has his friends in the city like Ned and MJ, while Diana has her Amazonian sisters. Merging these two social worlds would be no easy feat. And finally, they both have their own responsibilities in their respective worlds, and finding a balance between them while maintaining a marriage would be extremely difficult.
You can try searching on popular fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions from various fandoms, and there's a good chance you'll find some stories about Peter Parker and Diana Prince getting married there.
Their different worlds would blend in many ways. For instance, when it comes to their finances. Mystic might use her magic to help Peter find hidden treasures or valuable artifacts that he can sell to fund his superhero activities. In terms of food, they could have a mix of normal food and magical potions. And in their free time, they might combine Peter's love for photography with Mystic's magical landscapes, creating a whole new art form. Their relationship would be a unique blend of the scientific and the magical, constantly evolving as they learn more about each other's worlds.
One way it could happen is if there was a multiverse event. The multiverse allows for all kinds of strange combinations. Spiderman might be pulled into the Asgardian realm where he meets Sif. His heroic nature could attract Sif, and over time, they could decide to get married despite coming from very different backgrounds.
Well, one way is by having characters exchange powers. For instance, Zoro from One Piece could learn some sword techniques from the samurai in Naruto. And in return, Naruto characters could learn about Haki. Another way is to have a common power source that both worlds can access. Maybe there's a special energy in the fanfiction that combines chakra and the power of Devil Fruits.
In this fanfiction, Rogue's power to absorb the powers and memories of others and Spiderman's spider - like abilities could create some interesting scenarios. If Rogue absorbs Spiderman's powers, she might be able to use his spider - sense in a more instinctual way than he does. On the other hand, Spiderman could learn from Rogue how to better control his powers when she has absorbed some of his essence. Their powers could also be used in combat in a more coordinated way, like Spiderman creating webs for Rogue to swing on while she uses her absorbed strength to take down enemies.
They blend historical fiction with romance really well. For example, in 'Outlander', the historical backdrop of 18th - century Scotland is vividly described. The details of the battles, the way of life, and the social hierarchy are all there. And at the same time, the intense love story between Claire and Jamie unfolds. It's not just a side plot but an integral part of the narrative that is intertwined with the historical events.
Percy Jackson's power over water could be really interesting when combined with Diana Prince's combat skills. For example, Percy could create water barriers or even water weapons for Diana to use in battle. His ability to control the sea could also be used to quickly transport them across large bodies of water during their adventures together.