One type of Tai Lung fanfic could be a 'what - if' scenario. What if Tai Lung had been redeemed? Writers could create a story where he overcomes his pride and anger, and uses his skills for good. This would change the whole dynamic of the story and give a new perspective on his character.
The OC should have a clear motivation that ties into Tai Lung's world. For example, if the OC is also a martial artist, they could be seeking to prove themselves against Tai Lung, which immediately creates a connection.
Tai Lung fanfic often gives readers a chance to see the character in a new light. It can show his softer side, which was not much explored in the original. Maybe he has a love interest that no one knew about, and a fanfic can build a whole story around that relationship.
In a fanfic, Tai Lung could be redeemed. Maybe he was wrongly influenced in the past. Po, being the kind - hearted panda, decides to help Tai Lung find his true self. They start training together, and Tai Lung begins to see the value in the Dragon Warrior's way of life. Their relationship evolves from enemies to something more like mentor - mentee in a reversed way, with Po guiding Tai Lung.
Often in fanfiction, Tai Lung's split between good and evil is a central theme. His upbringing in the kung fu temple might have instilled certain values that are considered 'good', like discipline and respect for the art. However, his jealousy towards Po and the sense of being wronged when he was denied the Dragon Scroll could be seen as the catalysts for his 'evil' transformation. Authors might explore how he could have been redeemed if he had been able to balance these two sides of his nature, or how his 'evil' side completely took over due to the circumstances.
Another storyline might involve a time - travel element. Tai Lung and Tigress are sent back in time to when Tai Lung was still a young student. Tigress, knowing what will happen in the future, tries to steer Tai Lung away from the path of jealousy and anger. They could form a bond as friends and training partners, and this new relationship changes the course of events, preventing Tai Lung's fall from grace.
One common theme could be the exploration of their relationship in a more romantic or complex way. Since they are from different sides in the Kung Fu Panda universe, there might be themes of redemption and understanding in the fanfiction.
One idea could be that Tai Lung meets an OC (original character) who has a unique fighting style that challenges his own. This could lead to a series of intense training sessions between them as Tai Lung is both intrigued and frustrated by this new opponent.
Some fanfictions might interpret it as a reaction to the strict hierarchy in the kung fu world. Tai Lung felt oppressed by the system, which led to his 'evil' rebellion. But deep down, he still had a sense of justice which was his 'good' side. For instance, he might spare the lives of the innocent while fighting against those he saw as oppressors. This duality makes for interesting character exploration in fanfiction.
One possible interesting plot could be that Tai Lung, after his defeat, has a change of heart. He and Tigress cross paths during her self - discovery journey. They start off as adversaries but gradually find common ground in their martial arts skills and their shared experiences of being outcasts in a way. This leads to a slow - burn love as they train together and learn to understand each other better.