Another plot could involve Link befriending a new, original character who has a special connection to the Wind Fish. This character could help Link understand more about the island's secrets and the true nature of his adventure, adding a new layer of mystery and friendship to the story.
A different approach could be a fanfiction where Link loses his memory completely when he washes up on Koholint Island. He has to start from scratch, not knowing who he is or what his purpose is. As he explores the island, he slowly regains his memories in fragments, which changes his perception of the island and his mission.
One idea could be a character awakening a new and unique jutsu. For example, Naruto could awaken a jutsu that combines the power of all the tailed beasts in a completely unexpected way. This could lead to new battles and challenges as the villains try to either stop him or steal this power for themselves.
One idea could be exploring the characters' lives after the events of the original story. For example, how Melchior and Wendla might adjust to a new society that is more accepting of their relationship. Another could be writing a prequel, delving into their childhoods and what led them to be the way they are in the main story.
One idea could be that Link is forced to dress as a girl for a mission in a hidden kingdom where only females are allowed. He has to navigate the courtly intrigue and keep his identity a secret while also trying to complete his real mission, like finding a magical artifact. Another plot could be that Link loses a bet to a mischievous fairy and has to spend a day dressed as a girl. Along the way, he discovers how differently people treat him and gains a new perspective on gender roles in his world.
One idea could be that Link, as a girl, has to face different challenges in Hyrule. Maybe the other characters initially don't recognize her and she has to prove herself all over again. Another could be that she uses her new form to infiltrate an all - female group that holds a key to saving the kingdom.
In a different scenario, there could be a magical mishap that causes Link and Fi to be in a situation where a kiss is the only way to break a curse or solve a problem. As they share the kiss, they both realize there are deeper feelings between them that they had not previously acknowledged.
One plot idea could be that Link, as a girl, has to hide her true identity in a world that doesn't expect a female hero. She could face challenges like being underestimated at first but then prove herself in battles. Another could be that she forms unique relationships with the other characters, like a different kind of friendship with Zelda. Maybe she also has to deal with newfound emotions and how they affect her heroic duties.
One idea could be that OoC Link accidentally travels to the world of Wind Waker Link. They could initially be confused by each other's appearance and way of life. For example, OoC Link might be shocked by the vast ocean in Wind Waker's world as his own world could be more land - based. Then they could start to learn from each other, like OoC Link teaching Wind Waker Link some combat techniques from his world, and Wind Waker Link showing OoC Link how to sail and navigate the ocean.
One idea could be to have the characters from both games meet in a mysterious in - between world. Maybe the protagonists from each game team up to fight a new, powerful threat that is causing chaos across both their realms. For example, the Avatar from Fates and Robin from Awakening could combine their strategic skills to lead their combined forces.
Marin is an obvious choice. She has a deep connection to Link and her own dreams and desires. You could expand on her story, like what if she discovers she has a hidden power that can help Link in his quest? Or perhaps she decides to leave the island with Link if he manages to wake the Wind Fish.
A great plot idea for Legend of Zelda baby link fanfiction could be that baby Link is raised by a family of Sheikah. Since the Sheikah are known for their stealth and knowledge, they could train baby Link from a very young age in their ways. As he grows, he starts to show signs of his destined heroism. He might discover a hidden Sheikah temple that has a prophecy about him. This could lead to a series of events where he has to prove himself worthy of the hero's path, all while still being a baby with limited physical abilities but a huge heart and an unwavering spirit.