One idea could be creating an OC who is a lost Jedi from an ancient order. They could have unique Force powers that were long forgotten. Another is an OC who is a smuggler with a heart of gold, getting involved in the Rebel Alliance's affairs by accident.
One idea could be about an OC (Original Character) in the corps who discovers a long - lost Jedi artifact. This discovery could lead to a race against the Sith to obtain it. Another plot could involve an OC with unique Force - related abilities in the corps trying to unite different factions within the Star Wars universe to fight a common enemy like the Yuuzhan Vong. Or perhaps an OC in the corps uncovers a conspiracy within the military ranks that threatens the stability of the galaxy.
One idea could be creating an OC who is a Jedi with a unique lightsaber form that combines different traditional forms in unexpected ways. For example, a form that mixes Ataru's acrobatics with Makashi's precision. Another idea is an OC bounty hunter who has a moral code that often puts them at odds with other bounty hunters in the Clone Wars universe. They might refuse certain jobs that involve excessive violence or harm to innocents. Also, an OC clone trooper with a special talent like being an amazing artist, using the limited resources on the battlefield to create art that gives hope and a sense of normalcy to his fellow troopers.
Integration with the existing 'Star Wars' lore. A good 'Star Wars Mandalorian OC fanfic' weaves the OC's story seamlessly into the established universe. It might reference important events, planets, or species from the official 'Star Wars' stories, which gives the fanfic a sense of authenticity and depth.
Another interesting angle would be to have a Clone Wars character, like Anakin Skywalker, land on Earth for some reason. His presence could cause a stir among the people, and his Jedi powers would be both fascinating and potentially terrifying to the Earth population.
One idea could be exploring the backstories of the clone troopers in more detail. Maybe focus on a particular clone and his relationships with his brothers. Another could be creating a new adventure for Anakin Skywalker during the Clone Wars that wasn't shown in the original series. For example, he could be sent on a secret mission to a planet that has a powerful and ancient Sith artifact.
One idea could be focusing on a young clone trooper who discovers he has unique Force abilities. He then has to hide this from his superiors while trying to figure out what it means.
A 'Star Wars crossovers fanfic' might involve a crossover with the Marvel universe. For instance, the Jedi could team up with the Avengers. Luke Skywalker and Captain America could lead their respective teams in a battle against a common enemy. It would be really exciting to see lightsabers and superpowers in one story.
One idea could be to have the Ninjago characters travel to the Star Wars universe. For example, Lloyd could meet Luke Skywalker and learn about the Force from him. Another idea is to combine the weapons and powers. The Ninjago weapons like the Golden Weapons could have some sort of interaction with lightsabers.
One interesting idea could be the reincarnation of a Jedi into a new era. They might bring back forgotten Jedi teachings and skills. For example, a reincarnated Jedi could have memories of ancient lightsaber forms and use them in new battles against the Sith or other threats.