There's a fanfic called 'Mythical Webs' which is really interesting. In this story, Percy's demigod powers and Peter's spider - powers interact in unexpected ways. It dives deep into how their different personalities would work together in various situations, and it's full of action and a bit of humor too. The character development is quite good as they learn from each other's strengths and weaknesses.
In a more comical scenario, Percy could accidentally get stuck in one of Peter's webs. Peter would have to quickly figure out how to get him out without hurting him. Percy would be a bit frustrated at first but then see the humor in it. And this could be the start of a great friendship. They could also make jokes about each other's worlds. Percy could tease Peter about his spandex suit and Peter could tease Percy about his orange Camp Half - Blood t - shirt.
One interesting crossover could be a scenario where Percy Jackson's water powers are used to help Peter Parker during a flood caused by some super - villain in New York. Maybe Percy uses his control over water to rescue civilians while Spider - Man swings around saving those in more precarious positions.
One great sad Peter Parker fanfiction is 'Alone in the Dark'. It delves deep into Peter's feelings of isolation after the death of a close friend. Another is 'Broken Webs' which focuses on his struggle with his identity when he's faced with a major setback in his life as Spider - Man.
One great 'Morgan and Peter Parker fanfiction' is 'The Unlikely Bond'. It beautifully explores their relationship in a post - Endgame world. The story focuses on how Morgan, with her Stark - like intelligence, helps Peter with his scientific projects at school. Another good one is 'Morgan's Protector'. In this, Peter takes on the role of protecting Morgan from threats that emerge due to her connection to Stark Industries. There's also 'A New Friendship' which shows how they gradually become friends and support each other through their respective traumas.
One great Peter Parker and Tony fanfiction is 'The Stark Internship'. It shows Peter's growth under Tony's mentorship in a very interesting way. The story has great character interactions and some exciting action scenes.
I really like 'Peter Parker: Hidden Identity'. In this fanfic, there are some unique twists on how his identity is kept secret. It's not just the typical 'hide the suit' kind of story. There are some great character interactions, especially between Peter and his friends, that add depth to the story.
A popular Loki and Peter Parker fanfiction is 'Unexpected Bond'. In it, Loki finds himself intrigued by Peter Parker's naivete and sense of justice. The author does a great job of building a relationship between the two characters that is both unexpected and heartwarming. You can find it on many fanfiction websites. Also, 'Partners in Mischief' is a fun read. It shows Loki and Peter getting into all sorts of adventures together, with Loki's mischievous nature often getting them into trouble, but Peter's quick thinking getting them out.
One great fanfiction is 'Peter Parker: The Avenger's Secret Weapon'. In this story, Peter uses his intelligence and spidey - sense to help the Avengers in unexpected ways. It has a lot of action scenes and great character interactions.
One great 'Deaged Peter Parker Fanfiction' is 'The Younger Avenger'. It shows Peter as a deaged version and how the Avengers react to this new situation. It's really interesting to see their interactions change.
Another idea is that Peter discovers the existence of demigods while investigating a series of strange disappearances in Central Park. He stumbles upon Percy who is on a quest. They initially have some misunderstandings as they come from such different worlds, but then they figure out that they can help each other. Percy helps Peter understand the magical side of things, and Peter helps Percy with his knowledge of the city's layout and technology.