You can try Archive of Our Own (AO3). It has a vast collection of fanfictions, and you're likely to find many 'Avengers Watch Homecoming' ones there. Just use the search bar and type in the relevant keywords.
A really cool fanfiction is when the Avengers watch Homecoming but in a sort of 'alternate universe' setting. In this story, they are from a different dimension where they have no idea who Spider - Man is. Their reactions to his character, his high school life, and his superhero antics are both hilarious and heartwarming. It's a great read for those who like to see different takes on the characters.
A plot could involve Spiderman accidentally getting caught in an Avengers - level battle right in his neighborhood. He then has to prove himself to the Avengers while also protecting his home and friends. Maybe he discovers a connection between the villain in the battle and the local crime in his area that he's been trying to stop in 'Homecoming'.
Definitely Spiderman and Iron Man. In 'Spiderman: Homecoming', Iron Man is already a sort of mentor to Spiderman. In a fanfiction, they could have more in - depth conversations about power and responsibility. Maybe Iron Man could give Spiderman some advanced tech that he has to learn to use while also dealing with high - school bullies who want to steal it.
Spiderman's reaction could be complex. He might start by being intrigued by the idea of fanfiction in general. As he reads the 'Spiderman Homecoming' fanfiction, he might be impressed by the attention to detail some fans put in. He may also be a bit embarrassed if there are overly sappy or romantic interpretations of his character. At the same time, if there are fanfictions that show him in a negative light, he might feel the need to defend himself, but overall, he'd probably see it as an interesting part of his popularity and the fans' creativity.
A great fanfiction in this genre is 'Avengers' Movie Night'. In it, the Avengers gather to watch Spider - Man: Homecoming. It's full of humorous exchanges as they react to the movie. For instance, Clint Barton keeps making jokes about Peter's youthfulness.
The three Avengers could be Iron Man, Captain America and Thor. Iron Man could provide the high - tech gadgets and strategic thinking. Captain America would bring leadership and his combat skills. Thor with his godly powers like lightning and super strength would be a great addition. They would each have different interactions with Spiderman, for example, Iron Man might be like a mentor to him, while Thor could be more of a friendly rival in terms of strength.
He could have a range of reactions. On one hand, if the fanfiction portrays him in a positive light, like highlighting his heroic deeds in new and interesting ways, he might feel flattered. On the other hand, if it misrepresents him, he could be frustrated. He might also get some new ideas for his future battles or how to interact with his friends from the fan - created scenarios.
In fanfiction, the Sokovia Accords can create a lot of tension in the 'Spiderman Homecoming' universe. Peter Parker, being a young and new superhero, might be directly affected by the Accords. For example, he could be conflicted about whether to support them or not. If he supports them, he might have to limit his activities in Queens which goes against his natural instinct to help people immediately. On the other hand, if he opposes them, he risks getting into trouble with the authorities and other established superheroes who are in favor of the Accords.
Well, you could start by creating a unique OC. For example, an OC who is a brilliant but shy science student. In the story, this OC could accidentally discover Peter Parker's secret identity while working on a science project together. They could then form an unlikely friendship, and the OC could end up helping Spiderman in a fight against one of his foes from 'Spiderman Homecoming' like the Vulture. Their knowledge in science could be used to create a device that disrupts the Vulture's wings or something.