One idea could be the Hound's journey after leaving King's Landing. He could encounter a group of outcasts and form an unlikely alliance to protect a small village from raiders. It would show his growth from a bitter, angry man to a more empathetic protector.
One idea could be exploring what would happen if a minor character like Gendry had been secretly trained in magic. He could use his newfound powers to unite the smallfolk against the warring nobles. Another plot could revolve around a female knight from the North who disguises herself as a man to fight in the wars, and along the way, she discovers secrets about the White Walkers that no one else knows. Or perhaps a fanfiction where Daenerys and Sansa form an alliance much earlier and together they reshape the power dynamics of Westeros.
One interesting scenario could be Sansa and the Hound meeting again after a long time apart. Sansa has grown stronger and more self - assured, and the Hound is still his gruff self. They might have a conversation where Sansa stands up to him in a new way, showing how much she has changed since they last interacted.
In some fanfiction, Arya and the Hound might have a heart - to - heart conversation about their pasts. The Hound could open up about his troubled childhood, and Arya could share her experiences in the House of Black and White. This would deepen their bond in a more emotional way.
A really cool 'Game of Thrones fanfiction' plot could involve the resurrection of some of the dead characters in a different way. For example, what if Ned Stark was brought back not as a vengeful wraith but as a wise advisor to a new king or queen? His honor and wisdom could shape the future of Westeros in a completely new direction. And it would be interesting to see how the other characters react to his return.
Perhaps a fanfiction where Daenerys Targaryen lands in Westeros earlier and forms an alliance with the Starks before the events of the main series. This would completely shift the political landscape and the fight for the Iron Throne. She could bring her dragons to help fight the White Walkers from the start.
One idea could be exploring what would happen if a minor character, like Gendry, had a more central role in the fight against the White Walkers. He could lead a group of common folk and prove that the power doesn't always lie with the nobles.
Another one is 'The Hound and the North'. It places the Hound in the context of the North, interacting with the Northern lords and warriors. It gives a fresh perspective on his character as he adapts to the different culture and challenges of the North.
One interesting plot idea could be the return of a long - thought - dead character with a new mission. For example, if Ned Stark somehow came back and had to navigate the even more complex political landscape of Westeros. Another could be the exploration of the relationship between Daenerys and Jon Snow in a more in - depth way, perhaps with some new challenges that test their alliance.
Another plot could involve a goddess who was once worshipped in ancient Westeros but forgotten over time. She resurfaces during the chaos of the Game of Thrones. This goddess has the power to manipulate the elements and she decides to test the worthiness of the claimants to the Iron Throne by sending various trials their way.
Perhaps a plot where the gamer character discovers a hidden aspect of the magic in the Game of Thrones world through their unique 'gamer' perspective. This could lead to new powers being unlocked and changing the power dynamics among the different houses.