A character who is an Earth historian could also be fascinating. In the Star Wars world, they could study the ancient cultures and civilizations of different planets, comparing them to the historical events on Earth. They might discover parallels between the rise and fall of empires in both universes and use that knowledge to predict future events in the Star Wars galaxy.
One interesting storyline could be the Jedi and Sith having to hide their powers in a modern-day city. They might have to blend in while still being true to their code or the dark side's temptations.
One interesting Star Wars Earth fanfiction could be about a Jedi who secretly lives on Earth and uses his powers to help those in need without revealing his true identity. For example, he might use the Force to stop a natural disaster or prevent a crime in a big city.
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.
One idea could be a human from Earth somehow getting transported into the Star Wars universe and having to adapt to the use of the Force. They might start as a complete novice but quickly learn and use their unique perspective from Earth to gain allies. For example, they could introduce Earth technology concepts to the Star Wars characters.
One idea could be that the girl from Earth discovers a hidden Jedi power within herself. Maybe she has a unique connection to the Force that no one on Earth or in the Star Wars galaxy has seen before. This could lead to her being hunted by both the Sith and the Jedi, as they are unsure whether she is a threat or a new hope.
Well, perhaps in some fanfictions, there could be a story where Earth has some unique resources that the Star Wars Empire desires. So, they send their forces to Earth to mine or harvest these resources, but they face unexpected challenges from Earth's diverse cultures and terrains. This could lead to a series of battles and negotiations between the Empire and Earth's leaders.
One interesting fanfiction could be about a character from Star Wars finding themselves in the world of Empire Earth. Maybe a Jedi has to adapt to the different warfare and cultures in Empire Earth. For example, they might use their lightsaber skills in a battle against the medieval - style armies in Empire Earth.
Maybe there's a fanfiction where a Sith Lord tries to take over Earth. The Earth's military would be no match for the Sith's powers at first. But then, through some clever thinking and the discovery of a hidden Earth - based energy source similar to the Force, they start to fight back.
One idea could be a crossover where characters from Earth's history, like ancient Egyptian pharaohs, team up with Jedi from Star Wars to fight against the Goa'uld from Stargate. They could combine their unique powers and technologies. For example, the Jedi's use of the Force and lightsabers along with the pharaohs' knowledge of magic and the Goa'uld's advanced weaponry would make for an exciting story.
Perhaps in the fanfiction, the technology from Star Wars is used to explore the deepest parts of Planet Earth. For example, using starships to reach unexplored caves or the ocean floor.