In this kind of fanfiction, Peter Parker might use time travel to prevent the events of Infinity War. Maybe he could go back in time to warn the Avengers about Thanos' plan earlier. This could lead to a completely different outcome, like they could gather more powerful forces or find a way to stop Thanos from getting all the Infinity Stones in the first place.
The consequences could be huge. If Peter Parker time - travels and manages to stop Thanos from getting all the Infinity Stones, the power balance in the universe would be completely different. Heroes who died in the original Infinity War might not die, but this could also mean that some villains might rise up against the new order, creating a whole new set of challenges for Peter and the Avengers.
His character often becomes more mature. By time traveling during the Civil War, he sees the consequences of the heroes' actions on a larger scale. This makes him more responsible and strategic in his decisions.
One idea could be that Peter Parker discovers an Infinity Stone by accident. Maybe he's on a routine patrol as Spider - Man in New York and stumbles upon a strange energy source that turns out to be an Infinity Stone. This discovery could put him in the crosshairs of many powerful villains who want the stone for themselves.
Time travel could expose Peter to different versions of himself. Say he travels to a timeline where he didn't get his powers. Seeing how his life could have been without them would make him appreciate his abilities more. He might also learn new skills or ways of thinking from these alternate versions of himself, which would enhance his character growth.
In some fanfictions, Peter might time travel during the Civil War itself. He could go back and forth in time to gather information. For example, he might learn about the real intentions of certain parties involved in the conflict. Then, he uses this knowledge to expose the truth and end the war, bringing the Avengers back together. He could also use his time - traveling abilities to save lives that were lost during the actual events of the Civil War.
Peter Parker holding an Infinity Stone in fanfiction would change the dynamics of the Marvel universe. His relationships with other characters would shift. His friends like Ned and MJ would be both worried and in awe of his new power. The villains would see him as an even greater threat. He might have to learn how to control the power of the Infinity Stone quickly, perhaps with the help of Doctor Strange, who has experience with powerful artifacts.
Well, the theme of alternate timelines is quite common. Peter may find himself in a world where things are very different from his own due to changes in the past. This can lead to interesting scenarios where he has to adapt. Also, the theme of fate vs. free will often comes up. He may wonder if he's supposed to change things or if the timeline is set in stone even with his time - traveling abilities.
Peter Parker might cope with trauma by using his sense of humor. It's something he's always done, even in the face of danger. In the aftermath of Infinity War, when things are really tough, he could use his jokes as a defense mechanism. It helps him keep his spirits up and also makes those around him feel a bit better.
Well, one possibility is that Peter could use time travel to prevent certain events that led to his own death in Infinity War. He might go back and warn the Avengers earlier about Thanos' plan, which could change the whole course of the battle.