The movie plot focuses on the big - picture events after Iron Man's snap. In fanfiction where Spider - Man snaps, the story could zoom in more on Spider - Man's personal journey. It could explore his family and friends' reactions in greater detail. For example, Aunt May's reaction would be a central part of the story. Also, the way the remaining Avengers deal with Spider - Man's snap might be different. They might be more protective of him or feel guilty for not being able to stop him from making such a sacrifice.
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 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.
The original movie had a set path of how things happened, like the way they used time travel which had its own consequences. In the fix - it fanfiction, the writers often change those aspects. They might come up with different ways to reverse the snap or prevent it altogether, which is a big departure from the movie's plot.
The junior novel may leave out some of the minor sub - plots that are in the movie. It will mainly focus on the central story of Spider - Man's journey in 'Homecoming'. Also, the movie can rely on the actors' performances to convey emotions, while the novel has to use descriptive language. For example, the way Tom Holland portrays Peter Parker's awkwardness in the movie might be described differently in the novel. The deluxe junior novel may also add some elements to make it more educational for kids, like explanations of scientific concepts related to Spider - Man's powers that the movie doesn't have the time to go into in detail.
Overall, Avengers: Endgame varies from the comic in various ways. For example, the power levels of some characters might be different, and certain storylines might have been condensed or expanded for better cinematic storytelling.
In canon, the rules of time travel were somewhat defined, but fanfiction often bends or breaks those rules for creative purposes. Fanfictions might explore time travel in ways that the original creators didn't consider. For instance, in endgame time travel fanfiction, characters could travel to points in time that were not even hinted at in the movie. And the consequences of time travel in fanfiction can be very different from what was shown in canon, leading to unique storylines.
The villains are presented differently as well. In the comics, Vulture has a different backstory and set of motives in most cases. In 'Spider - Man: Homecoming', his origin is more tied to the aftermath of the Avengers' actions. Also, the movie gives more emphasis on Peter's school life and his friends, which is not always as prominent in the comics. His relationship with Ned and his attempts to have a normal life while being Spider - Man are key elements that set it apart from the comic - book stories.
The focus on different aspects of Peter Parker's life. For example, it might explore certain relationships more deeply compared to other versions. And the visual style could be distinct, like how they show Spider - Man's web - slinging and movements.
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.
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.
It differs in that it focuses on his coming of age. Other stories might be more about his battles or specific villains. This one is about his growth as a person.