An interesting concept for an Ultimate Spider - Man OC fanfic would be an OC who has the ability to control plants. They could use this power to create barriers, traps, or even to heal the environment after battles. The OC could be an outcast because of their power and initially be distrusted by Spider - Man. But as the story progresses, they learn to work together. Another idea is an OC who is a time - traveler from the future. They know about certain events that are going to happen and try to prevent disasters, which sometimes puts them at odds with Spider - Man's way of doing things.
One idea could be creating an OC with a unique power set related to sound, like being able to manipulate sound waves for various effects such as creating sonic blasts or using echolocation. Another could be an OC who is a foreign exchange student from a technologically advanced country and brings in new gadgets to help Spider - Man. Maybe an OC who has a power to heal others but at a cost to their own health.
Well, you could have an OC who is a journalist in training and is always on the hunt for the real story behind Spider - Man. This could lead to some interesting interactions and plot twists. Or perhaps an OC with the power of teleportation, which could add a whole new dimension to the Spider - Man universe in terms of getting in and out of dangerous situations quickly. Also, an OC that is a scientist who accidentally creates a new type of villain while trying to help Spider - Man could be really cool.
Another plot idea is that the OC is a scientist who accidentally creates a new type of symbiote. This symbiote has different properties compared to Venom and Carnage. Spider - Man has to team up with the OC to control and understand this new creation, leading to a lot of action and character development.
An interesting OC for an Ultimate Spider - Man fanfiction could be a mutant who has spider - like abilities but also some other powers that set them apart. For instance, they might have the ability to communicate with spiders on a telepathic level. This OC could start out as an outcast in society, just like Peter Parker, but their powers are a bit more extreme and they have to learn how to control them. They could initially be seen as a threat by Spider - Man but then they team up to fight a greater evil.
One idea could be Spider - Man teaming up with a new, original superhero created just for the fanfic. They could face a villain who has the power to manipulate time, causing chaos in New York. Another could be exploring what would happen if Spider - Man lost his powers temporarily and had to rely on his wits and the help of his friends to stop a crime wave.
In an 'ultimate spider man crossover fanfic', a really interesting crossover could be with Venom. But instead of being enemies, they team up. Maybe there's a new symbiote - like threat that is even more powerful and they have to combine their powers to defeat it. Another idea is a crossover with the Guardians of the Galaxy. Spider - Man gets accidentally transported into space and has to team up with Star - Lord and the gang to get back home while also fighting off some space - pirates.
Maybe a fanfiction where all the Spider - Men and Women from different spider - verses team up to fight a common enemy that threatens all of their universes. It could be a powerful cosmic entity that is consuming the multiverse, and they have to combine their unique skills and knowledge to stop it. This would allow for a lot of cool interactions between the different characters.
One idea could be a crossover where Ben Tennyson and Spider - Man team up to stop a common enemy like Doctor Octopus who has somehow gotten his hands on some of the Omnitrix's alien DNA. They could combine their powers and skills to outwit the villain.
Maybe there's a plot where an ancient artifact is discovered in the city. This artifact has a connection to White Tiger's heritage. Spider - Man and White Tiger must protect the artifact from a group of thieves who want to use its power for evil. As they guard it, they learn more about each other's pasts and grow closer as friends and allies.
One idea could be to explore a different origin story. Maybe Peter Parker gets his powers in a more scientific experiment gone wrong at a high - tech research facility instead of the traditional radioactive spider bite. This could introduce new characters from the facility who either help or hinder him.
One idea could be to explore what would happen if Spider - Man had to team up with his greatest enemies to face an even greater threat. For example, teaming up with Doctor Octopus and Green Goblin against an alien invasion. This would create a lot of interesting character dynamics as they have to put aside their differences.
One idea could be exploring Spider - Man's identity crisis. He could struggle with how his friends and family react to his unmasked self. Maybe some fear for his safety more, while others are disappointed he didn't trust them enough to tell them sooner.