One idea could be a crossover where Naruto and Ahsoka meet in a dimension rift. Naruto's chakra and Ahsoka's connection to the Force could lead to some interesting power combinations and adventures as they try to find their way back to their respective universes.
Perhaps a fanfiction where Ahsoka, with her combat skills and wisdom, is brought to the Naruto universe. She could end up training with the ninja, sharing her knowledge of different combat styles, and in turn, learning about chakra from them. Naruto might be especially intrigued by her and they could form a strong friendship.
One idea could be that Galen Marek and Ahsoka Tano team up to face a new Sith threat. They might initially be suspicious of each other due to their different backgrounds. Galen with his training under Vader and Ahsoka's Jedi training. But as they work together, they start to respect each other's skills and form a strong bond.
In a fanfic, perhaps there is a time - travel element. Ahsoka is sent back in time and ends up meeting Darth Vader when he was still Anakin. She tries to prevent him from turning to the dark side. This would be a complex story as it would involve her trying to change the course of events without disrupting too much of the timeline.
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.
One idea could be a story where Anakin and Ahsoka are reunited after a long time apart. Maybe Anakin has been on a secret mission and Ahsoka has been exploring new parts of the galaxy. When they meet again, they have to work together to face a new threat that is endangering the Jedi Order.
One idea could be a story about Ahsoka Tano and Shaak Ti teaming up to rescue some younglings in a dangerous mission. They could use their unique skills, with Ahsoka's agility and combat skills and Shaak Ti's wisdom and connection to the Force, to overcome the various obstacles in their path.
A simple plotline could be that Ahsoka somehow gets transported to the Naruto world. She's mistaken for a strange ninja at first. Naruto befriends her quickly, seeing her as an outsider like he once was. They then go on adventures together, facing off against various ninja clans that are causing trouble in the land.
One idea could be that she is influenced by a powerful Sith artifact. Maybe she discovers an ancient Sith holocron that slowly corrupts her mind, making her question her Jedi teachings. This could lead to her making small compromises in her beliefs until she gradually slips towards the dark side.
Yes, there are likely some fanfictions out there with such a plot. Fanfiction writers often explore various 'what - if' scenarios, and Ahsoka Tano being kidnapped can be an interesting premise for a story. However, the quality and nature of these fanfictions can vary greatly.
In fanfiction, Ahsoka Tano is often depicted as a strong and independent character. She is shown to be highly skilled in combat, using her two lightsabers with great proficiency.