Another fanfiction concept could involve Jedi and Sith being reincarnated on Earth. They'd have to adapt to modern society while still holding onto their powers and the eternal struggle between the light and dark side. For example, a young Jedi might discover their powers in a world full of distractions and temptations, and they'd have to learn how to use them for good.
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.
Another idea is that a group of Jedi, on a mission related to the Clone Wars, end up on Earth. They discover a hidden Force-sensitive group here. Together, they work to protect this group from the threat of the Separatists who also somehow find their way to Earth.
Earth would likely have a mixed reaction. The scientific community would be fascinated by the Clone Troopers' genetic makeup and advanced weaponry. Civilians might be scared, thinking it's an alien invasion. However, some groups, like military enthusiasts, could see them as allies and want to cooperate. There would also be a lot of speculation about their purpose and where they came from. If the Clone Troopers came in peace, there could be a slow process of integration and cultural exchange.
One idea could be that Naruto is somehow transported to the Star Wars universe during the Clone Wars. He could use his ninja skills, like his shadow clone jutsu, in unique ways on the battlefields. For example, his clones could be used to create diversions while the Jedi try to outmaneuver the Separatist droids.
Perhaps a fanfiction where some of the Naruto characters are actually clones themselves, like in The Clone Wars. Naruto could be a special clone created with a combination of chakra and the Force. His purpose could be to bring peace between the two universes. Hinata could be a healer in this new world, using her gentle nature and Byakugan to sense injuries and use the Force to heal them. This would mix the two universes in a unique way and create a lot of new storylines.
A possible story idea could be that your OC Sith discovers an ancient Sith prophecy. They believe it will lead them to ultimate power. So, they start a quest to find the artifacts related to this prophecy during the Clone Wars. This could involve them infiltrating Jedi strongholds and causing chaos.
One interesting crossover could be the Jedi interacting with Earth's ancient warriors. Imagine a Jedi Knight facing off against a samurai. The Jedi's lightsaber skills against the samurai's katana. Another could be the Clone Troopers being transported to Earth during a major battle and having to adapt to Earth's terrains and cultures.
Well, it could work by having the characters from Clone Wars arrive on Earth through a portal or some kind of space - time anomaly. They'd then have to deal with Earth's different environment, like its gravity and atmosphere. For instance, the clones might find it easier to move around due to the lower gravity compared to some of the planets in the Star Wars universe.
The Separatist droids would have a harder time adapting. Their programming is mainly for the Star Wars universe battles. But they could be reprogrammed by some Earth scientists or hackers, which could lead to some very unexpected situations, like droids being used for peaceful construction projects instead of war.
One plot idea could be exploring her relationship with her clone troopers in more depth. Maybe there's a mission where they have to rely on each other in an unexpected way. Another could be a story about her training a young Jedi padawan during the Clone Wars, showing her teaching methods and how she imparts the Jedi values.