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.
A plot could revolve around Barriss getting framed for a crime she didn't commit, and Anakin is the only one who believes in her innocence. They then embark on a journey to find the real culprit while also uncovering a deeper conspiracy within the Jedi Council and the Senate. This could test their loyalty to the Jedi Order and their friendship.
Perhaps a fanfic where Anakin and Barriss are sent back in time to a crucial moment in the history of the Jedi Order. They have to work together to make sure certain events happen correctly to preserve the future they know. Along the way, they gain new insights into the Jedi way and their own place in the Order.
One idea could be exploring a mission that Ahsoka and Anakin go on where they get stranded on an unknown planet. They have to rely on each other's skills to survive and in the process, Anakin imparts some deeper Jedi wisdom to Ahsoka. Another could be a story set during the Clone Wars where they face a new and powerful Sith enemy together, forcing them to combine their fighting styles in a unique way.
One plot idea could be that Ahsoka and Barriss are forced to team up on a mission to a remote planet. They initially have their differences due to past events, but as they face various challenges together, like fending off dangerous creatures and dealing with a corrupt local government, they start to understand and respect each other more. Their relationship could develop from one of distrust to a strong friendship.
Perhaps a story where Anakin and Barriss are both sent on a diplomatic mission to a war - torn world. They have to negotiate peace between two warring factions. Their different views on the Force and how to use it in such situations could cause some friction at first, but eventually they find a way to work together and bring about a truce.
Perhaps a fanfiction where Anakin, as a Sith, is sent on a mission by Palpatine. But on this mission, he meets a young Force - sensitive who reminds him of his own past. This makes him start to have doubts about the Sith ways. He begins to secretly teach the young one about the Force in a more balanced way, all while trying to hide it from Palpatine.
One idea could be that Anakin's spirit somehow guides Rey in her Jedi training. Maybe he appears to her in visions and imparts his unique knowledge of the Force, especially the more unorthodox aspects he learned during his time. Another plot could involve Rey finding an ancient artifact that was once connected to Anakin, and through it, she uncovers secrets about his past that help her in her fight against the new Sith threat.
Maybe a story where Ahsoka has a premonition about Anakin's fall to the dark side. She tries to prevent it in secret, which leads to all sorts of dangerous situations and moral dilemmas as she struggles with whether to tell the Jedi Council or handle it on her own.
A third plot idea is that Anakin travels to different points in time during key battles in the Star Wars universe. He could use his skills to turn the tide of battles that were lost in the original timeline. For example, he could go back to the Clone Wars and help the Republic win a crucial battle, or he could jump forward in time to assist the Resistance against the First Order. His time - traveling abilities would make him a wild card in these battles, and his presence could rewrite history.
One idea could be Anakin as a Sith having to face his former Jedi allies. He might struggle with his new identity while still having remnants of his Jedi self. For example, he could be sent on a mission by the Sith to destroy a Jedi stronghold but find himself hesitating when he sees his old friends there.
The SI could be a smuggler who crosses paths with Anakin during one of his missions. They team up and the SI shows Anakin a different side of the galaxy, one that's not all about the Jedi and Sith. This could make Anakin question his place in the galaxy and his loyalty to the Jedi Order. Their adventures together could range from dealing with pirates to uncovering ancient secrets.
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.