Well, in a Miles x Gwen Spider - Verse fanfic, it could be about their origin stories in this particular universe. It could show how they discovered their powers and how they came to be the heroes we know. There could be a lot of action scenes where they use their unique spider - abilities in creative ways. For example, Miles could use his invisibility and venom strike while Gwen uses her acrobatic skills and web - swinging in a more graceful manner. Their friendship or potential romance could also be a central part of the story, with them learning to trust each other more as they face various challenges.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and you're likely to find many Miles x Gwen 'Spider - Verse' fanfictions there.
There might be a fanfiction where Miles and Gwen go on a journey across different dimensions in the Spider - Verse to find a cure for a strange spider - related disease that's affecting all the spider - people. It could explore their relationship as they rely on each other during this difficult quest. In this story, they could face various challenges and meet different versions of themselves and other spider - characters from different universes.
One interesting storyline could be an OC with a unique spider - power, like the ability to turn invisible. They could team up with Peter Parker to take on a new villain in the Spider - Verse. Maybe this OC has a personal vendetta against the villain that adds an extra layer of drama to the story.
A Peter Parker OC can fit into the world by having a specific role or mission. Say, they are on a quest to collect fragments of a powerful artifact that has been scattered across the dimensions. This mission brings them into contact with Peter Parker and the other Spider - people. Their unique skills and abilities related to this mission would contribute to the overall plot and make them an integral part of the fanfiction.
One idea could be that different versions of Spiderman from across the multiverse team up to fight a common enemy that can travel between dimensions and is threatening all their worlds. For example, a powerful symbiote - like creature that has the ability to absorb the powers of each Spiderman it defeats.
One idea could be a story where Miles Morales has to team up with an alternate version of himself from a dimension where he never became Spider - Man. They have to overcome their differences and learn from each other to stop a new villain that is threatening all the spider - verse.
In Spider - Man Into the Spider - Verse story, it begins with Miles Morales. He's a young boy with his own set of insecurities and dreams. When he gains his spider - like abilities, he has to learn to control them quickly. The story takes a wild turn when the multiverse is involved. There are various versions of Spider - Man, each with their own unique styles and personalities. For example, there's a Spider - Man who is a noir - style detective. Kingpin's actions disrupt the balance of the multiverse. Miles, along with the other Spider - People, has to face many challenges, not only in fighting Kingpin but also in understanding and accepting his new role as a Spider - Man. It's a story full of action, humor, and heart - warming moments as Miles grows into his new identity.