Well, in this fanfiction plot, their shared origin as twins could lead to a different approach to the Force. Maybe they develop a new form of lightsaber combat that is based on their twin - like coordination. As the story progresses, Anakin's relationship with Padmé could also be affected. Since Obi - Wan is his twin, he might be more involved in Anakin's personal life. And when Anakin starts to feel the conflict between the Jedi Code and his love for Padmé, Obi - Wan, as his twin, tries to help him find a balance. This could potentially prevent Anakin from falling to the dark side, or at least make his fall a much more complex and drawn - out process.
Sure, in the world of Star Wars fanfiction, the possibilities are endless. Since the Star Wars universe has such a large and dedicated fan base, there are bound to be some stories where Obi - Wan is Anakin's twin. Writers might explore how their Force - sensitivities interact differently as twins. Maybe they would have a special way of communicating through the Force that is unique to their twin relationship. Also, it could add a whole new layer of drama to the story, especially when Anakin starts to turn to the dark side. How would Obi - Wan, as his twin, react?
If Anakin killed Obi Wan, it could have a domino effect. Anakin's relationship with other characters would likely change. Maybe the Jedi Order would crumble faster, and the Sith would gain more dominance. It's a fascinating 'what if' scenario to explore in fanfiction.
In this fanfiction, the main plot might involve Obi - Wan gathering allies to support Anakin. He could be seeking out ancient Jedi knowledge or artifacts that could help turn Anakin back to the light. There could also be a sub - plot where Obi - Wan has to face off against his own doubts and fears about whether Anakin can truly be saved, all while in the middle of a galaxy - wide conflict.
One common theme is loyalty. Their relationship was based on loyalty in the Jedi Order, but that loyalty gets tested as Anakin starts to turn to the dark side. Another theme is mentorship. Obi - Wan was Anakin's mentor, and fanfictions often explore how that mentorship influenced Anakin's growth and downfall.
In many fanfictions, Obi - Wan might use his deep knowledge of the Force. He could reach out to Anakin through a Force - bond, calming his inner turmoil and guiding him away from the dark side. For example, he might remind Anakin of their past together, their training, and the values they once held dear.
The plot could involve Obi - Wan's hidden influence on the Rebel Alliance. He could be subtly guiding key decisions from the afterlife. For instance, he might nudge Hera Syndulla to take a certain route during a battle that would lead to victory.
Well, it could be a very tense encounter. Anakin has his own complex history with Obi - Wan. His meeting with Obi - Wan's son might be filled with a mix of emotions. Maybe he would see some of Obi - Wan in the son and be both resentful and nostalgic at the same time.
There are indeed such fanfictions. Some of them focus on the deep bond between Anakin and Obi - Wan and re - imagine it in a different way. But these are mainly for the enjoyment of fans who like to explore alternative storylines and character dynamics within the Star Wars universe. Keep in mind that the official Star Wars story doesn't go in this direction.
The most obvious implication is the destruction of Obi - Wan's world. Obi - Wan would be devastated and likely turn all his efforts towards revenge. This would change his character from a calm and collected Jedi to a more vengeful figure.
One possible plot could be that a new, unknown criminal organization kidnaps Obi - Wan. They've heard of his skills and plan to sell him to the highest bidder. Meanwhile, his Padawan, Anakin, goes on a desperate search to rescue him, facing many challenges along the way, like dealing with the criminal underworld and other Jedi who may not fully support his mission.