A great plot could be that the reader is a knight in training who challenges Jaime to a duel. Jaime is impressed by the reader's skill and courage. As they start to train together, they realize they have a lot in common. This could lead to a friendship that slowly turns into a deeper relationship. And with the backdrop of the power struggles in 'Game of Thrones', their relationship would be constantly tested.
One interesting plotline could be an alternate universe where Jaime decides to fully turn against Cersei much earlier. He might expose her secrets to save the realm from her tyranny, leading to a complex power struggle within King's Landing.
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.
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.
In some fanfiction, there could be a scenario where they are shipwrecked on an island. They have to rely on each other to survive, building shelters, finding food. This would force them to confront their feelings for each other more directly as they are isolated from the outside world.
One interesting fanfiction could be about Jaime and Brienne's adventures after the events of the series. Maybe they travel together to help the common folk in a war - torn land. Another could focus on their relationship evolving in a more romantic way, like them sharing a private moment during a journey where they realize their deep connection.
Another possible storyline is a more character - study - based one. It could explore their relationship from a different perspective, perhaps delving deeper into their childhood and how it shaped their incestuous relationship. Maybe there are hidden memories or events that the show didn't fully explore, and fanfiction can be a great place to dig into those aspects of their characters.
One idea could be a crossover where the vampires from 'Vampire Diaries' find themselves in the political intrigue of 'Game of Thrones'. Maybe Damon Salvatore tries to charm his way through the courts of King's Landing, causing all sorts of chaos as his vampire nature is revealed bit by bit. Another plot could involve the White Walkers being related to some ancient vampire curse in the 'Vampire Diaries' lore, and the characters from both universes have to team up to stop the impending doom.
One idea could be that the OC is a healer from a far - off land who comes to King's Landing. Cersei initially distrusts the OC but as time passes, she realizes the OC's skills are invaluable, especially when it comes to treating her children's ailments. This could lead to a complex relationship where Cersei struggles between her pride and her need for the OC.