One interesting storyline could be Robb Stark forging new alliances. Since he didn't die, he can use his military skills and charm to convince other houses to side with him against the Lannisters. He might also focus on strengthening the North, building better defenses and improving the lives of his people.
In some fanfictions, there might be a plot where Robb discovers Arya's true potential in a different way. Maybe he sees her combat skills and decides to train her further, creating a unique bond between them as they both strive for the survival of their family. This could involve them facing off against common enemies and making strategic decisions together.
Arya is often paired with Robb. They have a strong bond as siblings, and in fanfiction, they might team up to take revenge on their enemies or work together to restore the Stark family's honor. Arya's skills as an assassin could be very useful in Robb's campaigns.
Some fanfictions focus on the backstories of minor characters. For example, a story about the life of a Night's Watch member before he joined. It could explore his reasons for joining, his family, and how he coped with the harsh life at the Wall. There are also fanfictions that rewrite the end of the series in a more satisfactory way for fans, like Jon Snow actually ruling the Seven Kingdoms in a more just and prosperous manner.
One possible plot could be that Robb Stark manages to avoid the Red Wedding trap. Maybe he receives a tip - off from an unexpected source, like a disgruntled Frey servant. With this knowledge, he could turn the tables on his enemies. He might use his military strategy skills to ambush the Freys instead, and this could lead to a major shift in the power dynamics in the North, with Robb emerging as an even stronger leader.
One interesting storyline could be the Mountain's backstory before he became the fearsome warrior. Maybe exploring his childhood traumas that led him to be so ruthless.
One interesting storyline could be a soldier's journey from being a low - ranked footman to a respected knight. He might face many challenges like battles against wildlings, political intrigue within his own camp, and proving his worth to his superiors.
One interesting storyline could be a character from a minor house rising to unexpected power. For example, a character who was previously overlooked manages to form alliances with powerful families through clever manipulation and strategic thinking, much like how some characters in the original series did.
One interesting storyline could be a character discovering a new form of magic that was long forgotten in the 'Game of Thrones' world. For example, a young peasant girl finding a magical amulet that gives her the power to control the weather. This could completely change the power dynamics in the Seven Kingdoms as she uses her new - found power to either help the common people or try to claim the Iron Throne for herself.
One interesting storyline could be a character from the game taking a different path in the events of Westeros. For example, a minor character becoming a major player in the power struggle. Another could be an alternate version of a well - known battle, with different strategies and outcomes due to the gamer's influence. There are also fanfictions that explore the backstories of characters more deeply, like the early life of a Night's Watch member.
One interesting storyline could be a Forrester character becoming a key player in the power struggles of Westeros. For example, a Forrester might form unexpected alliances with major houses to secure their family's position. Another could be a Forrester's journey to discover a long - lost family secret that has the potential to change the course of the Game of Thrones world. And there might also be storylines where a Forrester tries to revive their family's fallen glory through various means like trade or military conquests.