Yes, there might be. There are numerous fanfiction platforms out there like Archive of Our Own (AO3) where such stories could potentially exist. You can try searching on these platforms using relevant keywords to find it.
You could try Fanfiction.net as well. It's one of the oldest and most popular fanfiction platforms. There are a lot of works on there, so it may take some time to sift through, but it's a good option. Also, check out some niche fanfiction communities related to the specific fandom that these characters belong to. They might have their own repositories or links to relevant fanfictions.
One great 'asoiaf jon snow fanfic' is 'The North Remembers'. It delves deep into Jon Snow's journey after certain events in the books. It really captures his character well and the cold, harsh atmosphere of the North.
One popular asoiaf fanfic is 'The Winds of Winter: A Different Path'. It explores an alternate storyline where some of the major characters make different choices. Another one could be 'A Song of Ice and Fire: The Lost Tales' which delves into the backstories of some minor characters in great detail. And there's also 'Asoiaf Fanfic: The Dragon's Heir' that focuses on the descendants of the Targaryens in a new and exciting way.
One popular 'asoiaf graphic novel' is 'A Game of Thrones: The Graphic Novel'. It beautifully visualizes the complex world and characters of the original series.
The Starks are great for fan fiction. Their strong family bonds, sense of honor and the large number of interesting characters within the house, like Arya, Jon Snow and Sansa, offer a lot of material for creative stories. You can explore themes of revenge, loyalty and survival through their eyes.
To start writing an asoiaf crossover fanfic, begin by choosing the crossover element carefully. Are you going to cross it with a modern - day setting or another fantasy world? Once you've decided, do research on both. For example, if it's a crossover with a superhero universe, learn about the powers and ethics of the superheroes. Then, create an engaging character from one of the worlds who will be the catalyst for the story. Start with a strong opening scene that shows the contrast between the two worlds.
A possible plot could be that Rhaenys and Robb meet by chance, and despite the initial shock of their different backgrounds, they fall in love. Their marriage then becomes a symbol of hope for a more united Westeros. They might have to overcome the objections of their families and the political unrest that such a union could cause. It could also involve them learning about each other's traditions and forging a new path for their combined houses.
One way to find fanfiction about Rhaenys Targaryen and Robb Stark getting married is to join relevant fan communities. For example, on Reddit, there are sub -reddits dedicated to different fandoms. You can post a request there asking if anyone has read or written such a fanfiction. People are usually quite helpful in these communities and might be able to point you in the right direction.
One interesting 'asoiaf val fanfic' story could be about Val's adventures beyond the Wall. Maybe she discovers a hidden tribe with unique customs and has to navigate their politics while also trying to keep the peace between them and the Free Folk she represents. Another could focus on her relationship with Jon Snow in a different light, perhaps a more in - depth exploration of their potential romantic feelings and how it would affect the political situation in the North.