Another fanfiction could be set during the Clone Wars. Little Obi - Wan might be involved in a mission where he has to team up with some unexpected allies. He could use his wits and lightsaber skills to outsmart the Separatist forces. This would also explore his relationship with his clone troopers at that time.
There could also be a fanfiction that delves into Obi - Wan's time on Tatooine while watching over Luke. It might be a story where he has to protect Luke from some local threats without revealing his true identity or using the Force too blatantly. He uses his wisdom and experience to keep Luke safe in the harsh desert environment.
One interesting Anakin and Obi - Wan fanfiction could be about their early days as master and apprentice. It might explore how Obi - Wan tried to teach Anakin the ways of the Force, like in a story where they go on a mission together to a strange planet. Anakin might make some rookie mistakes and Obi - Wan has to patiently guide him. Another could be a story set during the Clone Wars, where they face a difficult battle and have to rely on each other's skills to survive. There are also fanfictions that explore what could have happened if Anakin had not turned to the Dark Side, and how their relationship would have continued to grow and develop in a positive way.
There could be a story where Obi Wan's ghost is seen on the planet Tatooine, hovering near the old homestead of Luke Skywalker. Maybe he's there to keep an eye on the place, as it holds so many memories of his time with Luke. He could be a silent protector, and those who sense his presence might feel a strange calm and a sense of being watched over. It gives a sense of his continued connection to the physical world even in his ghostly state.
In some 'dark Obi - Wan Kenobi fanfiction', he could be corrupted by a Sith Lord who manipulates his past traumas. The Sith might use his memories of the Clone Wars and his losses to push him towards the dark side. Obi - Wan would then have to fight not only the external influence but also his own demons as he descends into a darker version of himself.
One common theme is his growth. It often shows how he develops from a young Padawan to a great Jedi Knight. Another theme is his relationships, like with Anakin or Qui - Gon.
Yes, there are some 'obi wan married' fanfictions out there. Some might explore an alternate universe where Obi - Wan gets married. However, the quality can vary greatly. You can often find them on fanfiction - specific websites.
One great Obi - Wan fanfiction is 'The Apprentice's Path'. It delves deep into Obi - Wan's early days as a Padawan, exploring his relationship with Qui - Gon Jinn in a really interesting way. It shows his growth and the challenges he faced. Another one is 'Obi - Wan's Secret Mission' which takes place during a time gap in the movies. It has a lot of action and also some great character moments for Obi - Wan as he tries to complete a dangerous mission on his own.
One interesting idea could be a female Obi - Wan being a mentor to a younger generation in a different way than the male Obi - Wan. She might use her unique perspective to train Jedi. As for Vader, a fanfiction could explore his relationship with this female Obi - Wan in a more complex way, like they have a grudging respect for each other's skills.
One interesting concept could be Obi - Wan traveling back in time to prevent certain tragedies in the Star Wars universe. For example, he might try to stop Anakin's fall to the dark side. This would completely change the course of the story we know.
One interesting concept could be a crossover with the Star Trek universe. Imagine Obi - Wan using the Force in a world where technology and different species co - exist in a more scientific - based way. Another concept might be a crossover with the Lord of the Rings. Obi - Wan could bring his Jedi skills to Middle - earth and interact with the wizards and warriors there. Also, a crossover with the Harry Potter universe could be cool, with Obi - Wan teaching the young wizards about the Force which could be seen as a different form of magic.
One interesting fanfiction could be about Qui - Gon Jinn's early days of training Obi - Wan. It might show how Obi - Wan struggled with certain Force techniques and how Qui - Gon patiently guided him. Another could be a story set during a mission they undertook together that isn't shown in the movies, like exploring a lost planet filled with ancient Jedi secrets. And there could also be a fanfiction that focuses on their relationship outside of the Jedi duties, perhaps how they would relax and have philosophical discussions.