One idea could be exploring the backstories of the Lost Boys in more detail. Maybe one of them has a hidden talent or a past connection to Neverland that even Peter doesn't know about.
Another plot could involve a new threat to Neverland that forces the Lost Boys and Peter Pan to form an alliance with some unexpected characters from other fairy - tale lands. This would bring in new dynamics and challenges for them to overcome.
One interesting story could be about a modern - day girl who stumbles into Neverland and has a romantic encounter with one of the Lost Boys. It might explore their different worlds colliding.
One idea could be exploring Wendy's life back in London after her adventures in Neverland. Maybe she's having a hard time adjusting and misses Peter terribly. Another could be a story where Peter brings some of the Lost Boys to London for a visit and the chaos that ensues. A third idea might be a tale where Wendy's younger siblings grow up and start to doubt the existence of Peter Pan, but Wendy has to convince them he's real.
One plot idea could be a modern - day Peter Pan who discovers the real world has changed a great deal. He has to adapt to technology and new social norms while still maintaining his Neverland spirit. Another could be a story where Peter Pan meets a character from another fairy - tale realm and they go on an adventure together in Neverland. Maybe a girl from a strict, old - fashioned society stows away on his ship and he has to teach her how to have fun and be free.
One plot idea could be that a lost girl in Neverland discovers she has a special power that can break the eternal youth spell on Peter Pan. Another could be a lost girl forming an alliance with the mermaids to find a way back home against Peter Pan's wishes. And a third could be a lost girl trying to rewrite the rules of Neverland to make it a more equal place for all the lost children.
One idea could be that Baelfire gets lost in Neverland and Peter Pan has to decide whether to help him or use his situation to his advantage. Maybe Baelfire has a special power that Peter Pan wants for himself.
One idea could be that Peter Pan and Merlin meet in a magical realm between Neverland and Camelot. They team up to fight a common enemy, like an ancient evil sorcerer who is trying to steal the magic from both their worlds. Peter's ability to fly and his eternal youth could be combined with Merlin's powerful magic skills to create a really cool adventure.
One idea could be that Emma, a modern - day girl, somehow gets transported to Neverland. She then has to learn to adapt to the strange and magical world. Peter Pan is initially suspicious of her but as they go on adventures together, like facing Captain Hook, they start to form a strong bond.
One idea could be that Moira gets lost in Neverland and Peter Pan has to find her before the pirates do. He discovers new parts of Neverland in the process.
A possible plot is that Wendy gets lost in a previously unexplored part of Neverland. Peter Pan and the Lost Boys go on a frantic search for her. While lost, Wendy discovers a hidden tribe of magical creatures that are shy and have been avoiding contact with the Lost Boys. Wendy befriends them and they help her find her way back. This could lead to a new alliance between the Lost Boys and these creatures.
Well, a really cool plot for Tinkerbell and Peter Pan fanfiction might be that Tinkerbell accidentally breaks a powerful magic item in Neverland. This causes chaos as the magic starts to go haywire. Peter Pan and Tinkerbell then have to go on a quest to find the pieces and fix it. Along the way, they might encounter some old foes who are taking advantage of the situation. Also, they could discover secrets about Neverland's past that they never knew before. This would not only test their friendship but also their courage and wits.