In some fanfiction, Peter could return to Narnia only to find that it has been modernized in a strange way. There are now elements of the human world, like cars or electricity, but they are mixed with Narnian magic. Peter has to adapt to this new Narnia and deal with the problems that come with this odd combination, such as new forms of evil that take advantage of the changes.
Perhaps Peter returns to Narnia and finds that time has passed differently there. His old friends have aged much more than he expected, and there are new political tensions in the land. He then has to use his leadership skills from his previous time in Narnia to help resolve these issues and bring peace back to the kingdom.
The White Witch could be resurrected as the main antagonist. She was a powerful and evil force in the original Narnia stories, and her return would pose a great threat to Peter and Narnia once again.
One possible plotline could be that Lucy's pregnancy is a result of some magical interference in Narnia. Maybe a powerful spell was cast on her accidentally or as part of an evil plot. And she has to deal with the consequences while also trying to protect Narnia from an upcoming threat.
One possible plotline could be that Peter is poisoned by one of his enemies, like the Green Goblin. He then has to struggle to find an antidote while still trying to keep his identity a secret. Maybe he uses his scientific knowledge to analyze the poison and find a cure, all while fighting off the effects of the poison.
One possible plotline could be Peter's struggle to survive on the streets. He might have to face various hardships like finding food and shelter while also dealing with his past or some sort of inner conflict.
A plotline could involve Peter having a major falling out with his loved ones. For example, if he feels betrayed by his friends or Aunt May, he could turn evil. He might then use his knowledge of the superhero community to target other heroes and villains alike, causing chaos in the city. Another idea is that an outside force, like an alien symbiote or a powerful magic, could influence his mind and make him evil, leading to a series of events where he tries to reshape the world according to his now - twisted views.
One possible storyline could be that Peter Quill returns to Earth to find his long - lost family. Maybe he discovers a new side of his heritage that he never knew before. Another could be that he comes back to Earth to share the knowledge and technology he has gained from his space adventures, which could have a huge impact on Earth's future.
In this fanfiction, perhaps Peter Parker is a huge dragon fan from a young age. One day, he somehow gets transported to a world full of dragons. There, he uses his intelligence and Spider - Man - like skills to survive. He might learn how to communicate with the dragons and ends up befriending one. This dragon could then help him get back to his own world, but not before he has to face some challenges in the dragon world, like saving the dragon eggs from poachers.
One interesting plotline could be Peter Parker coming back to find that his city has changed a great deal in his absence. Maybe new villains have emerged and he has to quickly adapt to the new threats. Another could be his relationships with his friends and family being strained after his return, and he has to work to repair them.
A possible plotline could be that Peter and Ava are hiding from someone while sitting in the tree. They might be in a dangerous situation and the tree provides them a vantage point and a hiding place.
A possible plotline could be Peter deciding to break away from the Avengers or any big superhero group he's associated with. He might feel that he's not growing as much as he could on his own. So, he sets out to be a solo hero again, facing new challenges without the backup of the group.