One interesting scenario could be that it was actually a planned assassination by a secret alliance of the Starks and the Tyrells long before the wedding. They worked together in the shadows, using Sansa as an unwitting pawn. The Tyrells provided the poison, and the Starks had someone in place at the wedding to ensure Joffrey drank it.
In some fanfiction, Joffrey's death could be part of a magical curse. Maybe a long - forgotten sorcerer had put a curse on the Lannister line due to their past misdeeds. When Joffrey reached a certain age or committed a particular act of cruelty, the curse took effect, causing his sudden and painful death at the wedding.
One interesting scenario could be a rewrite of their relationship where Joffrey is secretly influenced by a more benevolent force. This might lead him to treat Sansa with more kindness than in the original series. Maybe he starts to see the value in having an ally in Sansa rather than just using her as a pawn.
In some fanfiction, it might be Varys. He was known for his intelligence network and his ability to work from the shadows. He could have seen Joffrey as a threat to the stability of the Seven Kingdoms. So, he arranged for the young king's death, perhaps thinking that a more malleable ruler could take his place and be more easily influenced to make better decisions for the realm.
Some fanfictions might focus on an alternate universe where Joffrey is not a king. He could be a simple knight, and the story could explore how his personality would develop without the power and privilege of the throne. He might learn humility and honor in a different way.
In some 'Game of Thrones' headshave fanfiction, a common scenario could be a character like Sansa having her hair shaved as a symbol of her transformation. It could represent her shedding her naivete and becoming a more hardened figure in the cut - throat world of Westeros.
Well, in the Game of Thrones chatroom fanfiction, there might be a scenario where Jon Snow decides not to go to the Wall. Instead, he stays in Winterfell and becomes a key figure in the political games there. He could use his knowledge of the North and his Targaryen heritage in a different way, perhaps uniting the North in a new and unexpected manner. This would change the whole dynamic of the power struggle in Westeros.
One idea could be an OC who is a healer in King's Landing during Joffrey's reign. The OC secretly tries to undermine Joffrey's cruel rule by using their medical knowledge to help those he persecutes. They might start by treating the families of those unjustly imprisoned. This could lead to a dangerous game of cat and mouse with Joffrey and his cronies as they suspect someone is working against them.
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 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.
One interesting scenario could be Daenerys and Daario going on a secret mission together. They might have to infiltrate an enemy stronghold, relying on each other's skills. Daario's combat expertise and Daenerys' ability to command and strategize would make for an exciting adventure.
Another scenario could be a more romantic one. Theon, having redeemed himself, realizes his true feelings for Sansa. They might have a moment where they share their past traumas and find solace in each other, slowly building a relationship based on mutual understanding and respect.