In this kind of fanfiction scenario, it would be a huge shock to the Star Wars universe. Obi - Wan is known for his strong connection to the light side. If he turned, perhaps his relationship with Anakin would have been drastically different. Instead of being a mentor, he might have been a rival or even a corrupting influence on Anakin.
Well, if Obi Wan turned to the dark side in fanfiction, it would likely shake up the dynamics between him and the other Jedi. It might also change the outcome of many key battles and events in the Star Wars universe.
Perhaps Anakin manipulates Obi - Wan's emotions towards him. Anakin could play on their brotherly bond and twist it. He might make Obi - Wan think that by joining the dark side, they can save more lives together. Anakin could also introduce Obi - Wan to some dark side teachings that seem appealing at first glance.
Well, if that happened, it would be chaos. The dynamics between Obi Wan and Luke, for example, would be completely upended. And it would raise questions about his motivations and how he could be redeemed, if at all.
Maybe the Force itself could be an antagonist in a sense. The light side of the Force would be trying to pull Obi - Wan back from the dark side. And the natural balance of the Force that doesn't want too much dark side influence could be working against Anakin's plan to turn Obi - Wan. So the Force, in its own way, could be the main antagonist.
Count Dooku could be a prominent character. Given his own fall to the dark side, he might be a mentor or a rival to Obi - Wan in the fanfiction. Mace Windu is another one. His strict view of the Jedi Code and his relationship with Obi - Wan could be explored in the context of Obi - Wan's turn. And of course, there are the various Sith Lords and dark side adepts that might surround Obi - Wan, either as allies or enemies in his new dark side life.
One common theme is the struggle between light and dark within Obi - Wan. It shows how he might battle his own inner demons. Another is the impact on his relationships, like with Anakin or the Jedi Order.
Sure. There are quite a few. A lot of 'obi wan kenobi dark side fanfiction' plays with the idea of alternate universes. In these stories, factors such as his relationship with Anakin could take a different turn and lead him astray. Maybe he becomes disillusioned with the Jedi way and is lured by the power of the dark side. It's a really interesting concept to explore in fanfiction.
One common theme is the struggle between the light and the dark within him. It might explore how his relationships, like with Anakin, could have pushed him towards the dark side. Another theme could be the corruption of his Jedi ideals. For example, in some fanfictions, he might start to question the strict rules of the Jedi Order and how that leads to his dark turn. Also, his power could be a factor. The idea that his great power could be misused or lead to a thirst for more power, which is a very dark side trait.
A possible plot twist could be that Obi - Wan was actually faking being turned to the dark side all along. He was trying to infiltrate the Sith ranks to learn their secrets and stop them from within. He lets Anakin think he has succeeded in turning him, but in reality, he is still a Jedi at heart and has a plan to take down the Sith.