Another great one is 'Beyond the Battle of the Bastards'. It continues the story after the battle, exploring what might have happened to the various factions and characters in the following days and weeks, with some interesting plot twists.
You can try Archive of Our Own (AO3). It has a vast collection of fanfictions from various fandoms, including many great ones related to 'Battle of the Bastards'. Just search for the relevant tags and you'll be presented with a lot of options.
Jon Snow is always a memorable character in Battle of the Bastards fanfiction. His leadership and determination are often central to the stories. He is the one leading the fight against Ramsay Bolton, and his actions and decisions drive the plot forward. Another is Ramsay Bolton himself. His cruelty and cunning make him a very interesting character. In fanfiction, his devious plans and his attempts to outwit Jon are often explored in more detail.
In some fanfictions, a plot twist might be that a long - lost relative of Jon Snow shows up during the Battle of the Bastards. This relative could have a powerful army or some unique ability that changes the course of the battle completely. For example, if it was a Targaryen relative who had a dragon egg that hatched during the battle. The sudden appearance of a dragon would completely disrupt the battle and give Jon's side an unexpected advantage.
The first episode of King of the Mountains was the first episode of the drama series. The specific plot and content could only be known after watching the episode.
In the TV series " Celebrating Years," the Battle of Dong Mountain appeared in episode 46.
In this episode, the Eldest Princess Li Yunrui conspired with the Crown Prince and the Second Prince to deploy 20,000 Red Flame Soldiers on Dong Mountain. They wanted to use Xiao En and Ku He to kill the Qing Emperor. However, this plan was seen through by Fan Xian. With Uncle Wu Zhu's help, Fan Xian led Xiao En and Ku He to Dong Mountain and had them engage in a fierce duel with the Qing Emperor. In the end, the Qing Emperor successfully defeated Xiao En and Ku He, shattering the Crown Prince and Second Prince's plot.