A great plot for Ahsoka Tano crossover fanfiction could be a crossover with the Clone Wars era characters in a different scenario. For example, Ahsoka could find herself in an alternate timeline where she has to prevent Anakin from turning to the Dark Side much earlier. Or she could cross over with characters from the new Star Wars movies, like Rey. They could train together and exchange knowledge about the Force, combining the old and new ways of the Jedi.
One idea could be a crossover with the Star Wars Rebels crew. Ahsoka could team up with Ezra and Kanan to face a new threat that combines elements from different eras of the Star Wars universe, like a Sith Lord using ancient Jedi artifacts in a new way. Another plot could involve a crossover with the Mandalorian. Ahsoka could cross paths with Din Djarin and Grogu, perhaps helping them in a battle against remnants of the Empire while also sharing her wisdom about the Force.
One idea could be Ahsoka getting transported to the DC universe and teaming up with Batman. She could use her combat skills and Force - sensitivity to help him fight against Gotham's villains. Another plot could involve her meeting Wonder Woman and learning about the different types of power and heroism in the DC world. Maybe she gets caught in the middle of a battle between the Justice League and their enemies and has to use her Jedi wisdom to broker peace.
One plot idea could be Ahsoka finding herself in a parallel universe where she's considered a rogue Jedi. She has to team up with alternate versions of her friends to fight a common enemy. Maybe an ancient Sith cult has risen and they are the only ones who can stop it.
Another idea is a crossover where Rogue Ahsoka Tano stumbles upon a world full of magic. She has to use her Jedi skills in combination with the new magical elements she discovers there. For example, she might learn to combine the Force with magic spells to defeat an evil sorcerer.
One idea could be a crossover with Star Wars Rebels. Ahsoka could be betrayed by someone she thought was an ally in the fight against the Empire. Maybe a new character who was secretly working for Thrawn all along. This would lead to a complex plot where Ahsoka has to not only survive but also figure out who she can trust again.
A possible plot could involve Ahsoka being betrayed by someone she trusts deeply within the Jedi or among her friends. This betrayal could be so severe that it pushes her over the edge, and she turns to the dark side for revenge. She then uses her newfound dark side powers to seek retribution against those who wronged her.
One idea could be Ahsoka traveling back in time to the Clone Wars era and changing a small event that has big consequences. For example, she might prevent a key battle from happening which then alters the relationships between the Jedi, the clones, and the Separatists.
How about a fanfiction where Ahsoka teams up with some unexpected allies in the Rebellion? Say, she has to work with a group of smugglers who are initially hesitant to trust her. But as they go through various challenges together, they learn to respect and rely on each other. This could add some humor and new dynamics to the story.
A plot idea could be that Maul discovers a prophecy that involves Ahsoka and he decides to either protect or manipulate her depending on how he interprets it. This could lead to a complex relationship where Ahsoka is initially distrustful but then realizes Maul's motives are more nuanced.
A fanfic could explore a what - if scenario. What if Barriss never turned to the dark side? They could be sent on a dangerous mission to the Outer Rim. Along the way, they face challenges that test their friendship and their beliefs. There could be a sub - plot about Barriss being tempted by the dark side again, but Ahsoka helps her resist. They also encounter a new form of Force - based power that they have to learn to control together in order to complete their mission.
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.