A great plot for a Star Wars Geonosis fanfic could be exploring the underground world of Geonosis more in - depth. Maybe a group of smugglers discovers a hidden treasure or a powerful ancient artifact there. They then have to outwit the Geonosians and other villains who also want to get their hands on it. This could involve a lot of action - packed chases and battles in the unique Geonosian landscapes.
You could write a fanfic about a group of younglings who are sent to Geonosis for a training exercise that turns into a real - life - or - death situation. They are forced to use their newly learned Jedi skills in unexpected ways to protect themselves from the aggressive Geonosian warriors. As they struggle, they also learn about the history and culture of Geonosis, which helps them in their fight.
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.
Another plot could revolve around a non - Force - sensitive character in the Star Wars Visions world. This character is a skilled mechanic and engineer. They accidentally stumble upon a crashed starship from an unknown era. Inside, they find a strange technology that could change the balance of power in the galaxy. They then have to decide whether to sell it to the highest bidder or give it to the Jedi or the Galactic Republic for the greater good.
You could write about a secret mission within the Confederacy. For example, a group of soldiers are sent to retrieve a powerful artifact that could turn the tide of the war. Or perhaps a story about how the Confederacy tries to form an alliance with a previously unaligned planet, and all the diplomatic intrigues that come with it.
One idea could be a group of college students who discover a hidden Jedi or Sith artifact on campus. This could lead to a battle between those who want to use it for good and those for evil, just like in the Star Wars universe.
One idea could be exploring the backstory of a minor character in the series. For example, you could write about how a Stormtrooper decided to defect and join the Rebels. Another plot could involve a new threat that the Rebels have to face, something that even the Empire is not fully aware of. Maybe a powerful ancient Sith artifact is discovered and both the Rebels and the Empire are racing to get it.
Definitely include Obi - Wan Kenobi. He has a connection to Geonosis already from the movies. Anakin Skywalker would also be a great addition. And for a non - Jedi character, you could add a Geonosian rebel who is trying to overthrow the corrupt leaders on the planet.
A great plot could be Ahsoka having to face a Sith Lord who has a personal vendetta against her. This Sith Lord could be an old enemy she thought was dead. Or perhaps a plot where she is training a new group of Force - sensitive individuals in a post - Empire galaxy, and they face threats from remnants of the Imperial forces. Also, a story where she goes on a quest to find an ancient Jedi artifact that has been lost for centuries.
One idea could be a story where Anakin and Barriss are forced to team up on a mission to a remote planet. They start off distrusting each other due to their different beliefs and allegiances within the Jedi Order. But as they face various challenges like dangerous native creatures and a Sith - influenced local warlord, they gradually learn to understand and respect one another.
One interesting plot could be that the Emperor from Star Wars decides to use Earth as a testing ground for a new weapon. He sends some of his minions to Earth during WW2. The people of Earth, not understanding the true nature of these invaders, fight back. Meanwhile, a group of Jedi, who have been secretly observing Earth, decide to intervene. They train some of the bravest Earth soldiers in the ways of the Force, creating a new breed of warriors to take on the Emperor's forces. This would involve a lot of character development as the Earth soldiers learn to use the Force and adapt to this new way of fighting.