One possible storyline could be that Peter Parker sacrifices himself to save the city from a powerful new villain. Maybe he uses all his strength and resources to stop a doomsday device, but at the cost of his own life. The city then mourns their fallen hero, and his friends and family are left to pick up the pieces. His death could also inspire a new generation of heroes.
One possible storyline could be that as Peter Pan dies, Tinker Bell uses all her magic in a desperate attempt to save him. She might make a deal with the Neverland's dark forces, sacrificing her own well - being for his life.
One possible storyline could be Peter Parker's struggle to keep his identity as Spider - Man a secret while dealing with malnourishment. Maybe he's so focused on fighting crime that he forgets to take care of himself. Another could be that due to some financial difficulties, he can't afford proper food, and this affects his performance as Spider - Man. For example, he might be slower or less able to focus during battles.
Perhaps in the fanfiction, Peter Parker sacrifices himself to protect his loved ones. A powerful villain has targeted his aunt May, MJ and Ned. Peter realizes that the only way to stop the villain from harming them is to give up his own life, so he does something heroic and self - sacrificing like using his body to shield them from a deadly attack.
One possible scenario could be that Peter sacrifices himself to save others during a crucial battle in the Endgame - like situation in the fanfiction. Maybe he uses his powers to hold off a powerful enemy while the rest of the heroes complete a vital task.
In a 'Peter Parker gets a chibi' fanfiction, the chibi could be from an alternate dimension. Peter first thinks it's some sort of strange new enemy but soon realizes it's just a lost little being. He decides to help it find its way home. Along the way, they have all sorts of adventures. The chibi might have unique abilities that Peter doesn't have, like the ability to communicate with animals. This could lead to some interesting situations where they have to work together with the help of the animal kingdom to overcome obstacles.
A third storyline could be Peter on a date with MJ. All of a sudden, he has an asthma attack. This could add a layer of vulnerability to their relationship. MJ could be shown as being very caring and helpful, and it could also be a moment where Peter has to be honest about his health condition to someone he cares about deeply.
One possible storyline could be exploring the emotional turmoil Peter goes through due to the abuse. He might struggle with his sense of self - worth and his relationship with other superheroes. Another could be his journey to overcome the trauma and find a way to heal, perhaps with the help of his friends like Ned or MJ.
Perhaps in the fanfiction, there is a malfunction in Peter's suit technology. It could be that the suit's power source goes haywire and causes an explosion that kills Peter. This could be due to some sabotage by a new enemy who targets Peter specifically because of his growing reputation as Spider - Man in the Homecoming universe.
One plot twist could be that Aunt May's death was part of a bigger plan by a villain. Maybe the villain wanted to break Peter and make him more vulnerable. Another could be that Aunt May left behind a secret that changes Peter's view of his family or his powers.
One interesting storyline could be Peter using his spider - abilities in a ballet - related way. For example, his enhanced balance and agility from being Spider - Man could make him an exceptional ballet dancer. He might incorporate his acrobatic moves into a unique ballet performance that wows the audience.