Well, if Anakin discovers Obi - Wan's past in the fanfic, he may be shocked. Depending on what that past entails. If it involves some sort of hidden training or a past alliance that Anakin didn't know about, he could become suspicious. He might question Obi - Wan's motives for not telling him earlier. On the other hand, it could also inspire Anakin, seeing Obi - Wan's journey and how he overcame things in his past.
It could either strengthen or weaken their relationship. If Anakin discovers something noble in Obi - Wan's past, like a great sacrifice he made, it might make Anakin respect him more. But if he uncovers something that he perceives as a deception, like a hidden mission or a relationship that Obi - Wan kept from him, it could lead to mistrust.
There's the theme of trust. In a lot of Anakin and Obi - Wan fanfic, their trust in each other is either strengthened or tested. Another theme is the idea of destiny. How Anakin's destiny as the Chosen One and Obi - Wan's role in it are explored. And the theme of sacrifice. Fanfics might show how they are willing to sacrifice for each other, which is a big part of their relationship.
Sure. A lot of fanfic writers are more interested in the more platonic aspects of their relationship. They might write about how they train together, how they support each other in battles, or how they deal with the political situations in the Jedi Order. It's all about the comradeship and the shared journey in the Star Wars saga.
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.
One possible motive could be Anakin's fall to the dark side. The dark side clouds his judgment and makes him see Obi - Wan as an obstacle to his power. He might believe that by eliminating Obi - Wan, he can fully embrace the dark side and gain more control. Another motive could be jealousy. If Anakin feels that Obi - Wan is always favored or is holding him back in some way, this could fuel his anger and lead to him wanting to kill Obi - Wan. Also, the influence of Palpatine might play a huge role. Palpatine could have manipulated Anakin into believing that Obi - Wan is a threat to the new order he wants to create.
One possible plot could be that Anakin and Obi - Wan find a time - traveling device in the Jedi Temple. When they travel to the future, they are shocked to see the remnants of the Jedi Order. They meet new Force - sensitive individuals who have formed a resistance against a new dark side threat. Anakin, having redeemed himself in the past, uses his experience to train these new Force - users, while Obi - Wan tries to figure out how the Jedi Order fell so far and how to prevent it from happening again in this new future timeline.
Well, it could start with Anakin having a change in his mindset. He becomes more focused and determined to win against Obi - Wan. He studies Obi - Wan's every move and weakness. During the battle, he uses the environment to his advantage. For instance, he causes a landslide or some other natural disaster on the planet they are fighting on, which distracts Obi - Wan long enough for Anakin to strike the final blow.
Another theme is loyalty. They are master and apprentice, and their loyalty to each other is often tested. In some fanfics, they face situations where they have to choose between their loyalty to the Jedi Order and to each other. This can lead to some really intense storylines.
One common theme is betrayal. Anakin's actions, often related to his turn to the dark side, are seen as a betrayal of Obi - Wan's trust. This creates a deep sense of hurt in Obi - Wan.