Perhaps a story set during the Clone Wars where the Republic discovers a way to control the Zillo Beast and uses it as a weapon against the Separatists. But things go awry when the Beast breaks free from its control and starts wreaking havoc on both sides of the war, forcing the Jedi and the clones to find a new solution to stop it.
One idea could be a story where a young Jedi has to face the Zillo Beast in a secret underground lair on Coruscant. The Jedi must use the Force to understand the beast's motives rather than simply fight it.
The Zillo Beast should be shown as a powerful and fearsome creature. Describe its massive size, with scales that can deflect blaster bolts. It could move with a lumbering gait that still manages to be surprisingly fast when it charges.
A local inhabitant of a planet where the Zillo Beast is found. This character could have a deep connection to the land and the legends surrounding the beast. They would have a unique perspective and knowledge that could be crucial in either taming or surviving encounters with the Zillo Beast.
A really cool fanfiction idea would be to have the Sith Lords as the villains in the Beauty and the Beast story. Darth Sidious could be the one who placed the curse on the Beast in the first place, with his own dark motives. The Jedi, like Obi - Wan Kenobi, could come to the rescue. He could use his wisdom and the Force to try and break the curse. Also, imagine if the Ewoks from Star Wars were the small, helpful creatures in the Beauty and the Beast world. They could use their primitive but effective skills to assist the characters in the castle.
One idea could be exploring the origin of a new, mysterious force - user in the Shadow Wars. Maybe it's a forgotten Jedi or Sith technique that resurfaces and causes chaos. Another could be focusing on the relationship between a group of rebels and how they deal with the added threat of the Shadow Wars.
A great plot for Star Wars The Clone Wars fanfiction could be centered around a new, unknown planet that gets caught in the middle of the war. The planet has its own unique species and culture. The story could follow how the clone troopers and the Jedi interact with this new civilization, whether they try to protect it or use it for their own strategic advantages. Or perhaps a story where a group of clone troopers start to develop their own individual personalities and question their loyalty to the Republic due to some unethical orders they receive. This could lead to a conflict within the clone ranks and force the Jedi to take sides.
One idea could be exploring Blackarachnia's past before the Beast Wars. Maybe she had a different life or purpose that got derailed. Another could be a story where she forms an unlikely alliance with one of the Maximals, like Cheetor, and they have to work together to overcome a common threat. Or perhaps a fanfic that delves into her relationship with other Predacons, like how she might be trying to gain more power within their ranks while also dealing with her own internal conflicts.
One interesting plot could be Beast Wars Megatron getting his hands on a powerful ancient artifact on Earth that gives him an edge over the Maximals. This could lead to a series of battles where the Maximals have to figure out how to counter this new power. Another idea is a fanfiction where Megatron forms an unlikely alliance with a small group of Maximals to face a greater threat from a third, previously unknown faction. This would be full of tension as they try to work together while still being enemies at heart.
One idea could be exploring the backstory of the apprentice before they met their master. Maybe they had a family on a far - off planet that was destroyed, which led them to seek power. Another could be a story where the apprentice has to choose between loyalty to their master and doing what they believe is right. For example, if their master orders them to destroy an innocent village, they might rebel.
One idea could be that the triplets are force - sensitive and are secretly trained by an old Jedi master in hiding. They grow up to be a powerful force against the dark side.