One possible plot could be that Tai Lung somehow returns, not fully evil this time. Tigress, initially suspicious, gradually discovers that Tai Lung has had a change of heart after his time in prison. They could team up to face a new, greater threat to the Valley of Peace. Maybe a dark sorcerer has emerged and their combined skills are needed to defeat it.
It depends on the context. If we're talking about physical strength in a direct fight, Tai Lung was extremely powerful with his leopard style. But Tigress is no slouch either. In terms of personality, Tigress is very determined and disciplined, which could make her more dominant in decision - making situations. However, Tai Lung, if he were to return with a new perspective, could also be very persuasive.
It might not be a widely popular concept in the general Kung Fu Panda fandom. The relationship between Tigress and Tai Lung in the original movie is more of an antagonist - protagonist dynamic. However, in the world of fanfiction, some niche groups might explore this idea for the sake of creativity and exploring different character relationships.
A plot could be centered around Tai Lung's past. Po discovers some hidden secrets about Tai Lung's training and upbringing. He decides to go on a journey to find out more. Along the way, he meets characters who knew Tai Lung when he was young. This leads to a better understanding of Tai Lung's fall from grace and also helps Po in his own growth as a warrior. For example, Po might find an old master who trained Tai Lung briefly and learn from their experiences.
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.
One idea could be that the OC is a new student at the Jade Palace. Tigress is initially skeptical but as they train together, they start to respect and eventually fall in love with each other. They face challenges together like a new threat to the Valley of Peace.
A great plot twist might be that Po discovers he has some hidden connection to Tai Lung. For example, they could be related in some long - lost family way. This would add a whole new layer to their relationship and the story. Po would then have to grapple with the idea of fighting someone who is, in a way, family, and Tai Lung could use this knowledge to his advantage in different ways during their confrontations.
Another interesting plotline is if Baby Tigress has a vision of a great danger coming to the Valley of Peace. She tries to convince the other young trainees and the masters, but no one believes her at first because she's just a cub. So, she decides to take matters into her own paws and starts to train even harder to prepare for this impending doom. Along the way, she meets an old hermit who gives her some valuable advice and tools to face the danger.
A fanfiction plot could be centered around a human who accidentally stumbles into the Kung Fu Panda universe. Tigress mistakes the human for a threat. The human tries to explain but in the chaos, a fight breaks out. The human, though not as strong as Tigress, is very resourceful. Tigress is impressed by the human's tenacity and they form an unlikely alliance to face a greater threat in the Kung Fu Panda world.
In a fanfiction where Tigress gets jealous, it could be that there's a new student at the Jade Palace. This student seems to get all of Shifu's attention. Tigress, who has always been Shifu's star pupil in a way, feels left out and jealous. So she starts to train even harder, but also gets snippy with the new student. Eventually, she realizes that her jealousy is unfounded when she sees that the new student just wants to learn and doesn't mean to steal Shifu's attention.
One plot idea could be that the OC is from a far - off land with a completely different style of kung fu. Tigress is initially skeptical but as they train together, she learns new techniques. For example, the OC's kung fu could be based on fluid movements like water, which is very different from Tigress's more force - based style.