One great example could be a fanfiction where Spider - Man has to deal with the aftermath of the snap on a more personal level in his neighborhood. Maybe he's trying to help families who lost loved ones and is also struggling with his own losses among his friends. Another example might be a story where Spider - Man teams up with other heroes who were also affected by the snap to try and reverse its effects in a unique way that wasn't shown in the movie. There could also be a fanfiction that focuses on Spider - Man's mental state during the snap, like his fears and hopes as he witnesses such a catastrophic event.
In the movie, Iron Man is the one who snaps. But in fanfiction, Spider - Man snapping allows for a whole new set of stories. For instance, Spider - Man's age and inexperience compared to Iron Man would lead to different consequences. He may not fully understand the power he wields, leading to unforeseen outcomes. Also, his relationships with other characters would be affected differently. His friends and mentors would react in unique ways to his sacrifice.
One possible fanfiction could involve Spider - Man and Captain Marvel teaming up during the Endgame battle. Maybe Spider - Man uses his agility to distract the enemy while Captain Marvel blasts them with her powerful energy. They could also have some fun banter, like Spider - Man making a joke about how Captain Marvel can fly and he has to swing around.
Imagine in the fanfiction, Spider - Man discovers a new ability during Endgame that can complement Captain Marvel's power. He shares this with her, and they experiment with combining their powers in new ways. For instance, Spider - Man could create a web - like energy field using his new ability, and Captain Marvel could charge it with her cosmic energy to create a powerful shield or weapon against the enemy.
One interesting Spider - Man snaps fanfiction could be where Spider - Man snaps under the extreme pressure of multiple villains attacking the city simultaneously. In this story, he might have to make some tough choices that go against his usual moral code just to save the day. For example, he could be forced to team up with a former enemy who has some knowledge or power that can help in the fight.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created stories, including many about Spider - Man. Just use the search function and type in 'Spider - Man snaps' to see what comes up. Another option is FanFiction.net, which also has a wide range of fanfiction works related to Spider - Man.
It could be that the Iron Man's technology, which was used in the fight against Thanos, had some sort of hidden function. Spider - Man discovers this function while tinkering with the leftover tech. This function allows him to harness and concentrate a large amount of energy, similar to the power required for the snap. So, with his quick thinking and scientific knowledge, he figures out how to use it to snap Thanos out.
A plot twist might be that the snap doesn't completely get rid of Thanos. Instead, it splits Thanos into multiple versions of himself, each with different levels of power and different personalities. Spider - Man then has to face not just one, but several Thanos - like entities. Also, the snap could have unforeseen effects on the Infinity Stones. Maybe they scatter across different dimensions, and Spider - Man has to retrieve them to prevent a greater catastrophe, all while still dealing with the remnants of Thanos.
In Spider - Man fanfiction, one interesting aspect is the exploration of different relationships. For example, new friendships or romances for Peter Parker that might not be in the original comics or movies. It could also show how he deals with different villains in unique scenarios, like facing a more powerful version of the Green Goblin.