Maybe Arya discovers she has Targaryen blood. She could then embark on a journey to learn about her new heritage, facing challenges from those who oppose the idea of a Stark - Targaryen connection. She might also have to deal with the power struggles within the Targaryen family remnants.
I'm not sure if it's a popular fanfic. It could be that it depends on the specific community of 'Game of Thrones' or 'A Song of Ice and Fire' fans. Some might find the concept of Arya being related to the Targaryens interesting, while others may prefer more traditional interpretations. There could also be a lot of other fanfics out there that overshadow it.
A great plot could be that Arya and Aegon are brought together by fate during a time of great unrest in Westeros. Aegon wants to take the throne, but he realizes he needs Arya's unique skills. Arya, on the other hand, sees an opportunity to bring some sort of order to the land. They start off as reluctant allies but gradually grow to respect and trust each other. As they journey, they encounter different factions, some who support them and some who oppose. Their relationship evolves as they face battles, political intrigue, and moral dilemmas together. Along the way, they might also discover secrets about their families that change their perspectives on their goals.
Many fanfictions explore the idea of a prophetic connection between them. Maybe there are ancient prophecies that tie Arya and Rhaegar together. This can lead to a story where they are on a quest to fulfill these prophecies, either to save Westeros or to bring about a new era. The stories often involve a lot of mystery and discovery as they uncover the meaning behind these prophecies.
Some fanfictions might explore a romantic angle between them, which is quite an interesting concept given their very different backgrounds. Arya is a Stark, bred in the North with a sense of loyalty and justice, while Rhaegar is a Targaryen with a more complex and often controversial past. However, in the realm of fanfiction, the writers can create a connection between them that might be based on shared ideals or a mutual understanding of the power struggles in Westeros.
One plot idea could be that Arya and Aegon meet during their travels. Aegon, with his claim to the Iron Throne, is in need of a skilled ally like Arya. She could help him in his political maneuverings in a way that no one else can, using her skills of disguise and stealth. Another could be a story where they are forced to team up against a common enemy, like a new threat rising in the Seven Kingdoms that neither the Starks nor the Targaryens can face alone. They start off distrustful of each other but gradually come to respect and rely on one another.
One possible plot twist could be that Arya, being a master of disguise, infiltrates Daenerys' court under a false identity. She initially plans to spy on the Dragon Queen but ends up being impressed by Daenerys' leadership and her quest for justice. This could lead to an unexpected alliance between the two strong - willed women.
Another aspect could be the challenges they face during the pregnancy. Arya might have difficulties adapting to the physical changes. And there could be external threats as well, like enemies who see this as an opportunity to harm them. The fanfic could build tension around protecting Arya and the baby, while also exploring the growing love and bond between Arya and Gendry.
Arya's fierce independence and no - nonsense attitude might clash with Aegon's more traditional and perhaps entitled view of royalty. However, Arya's skills in combat and survival could complement Aegon's need for protection and her ability to blend in could be useful for his political maneuvers.
An 'arya threesome fanfic' is a type of fan - created fictional work. It likely involves a character named Arya in a scenario with three characters in some sort of relationship. However, it's important to note that such fanfics can vary greatly in nature, theme, and tone depending on the author's intentions and the source material from which Arya is drawn. Fanfics are often a creative outlet for fans to explore different storylines and relationships that may not be part of the official canon of the original work.