A really interesting fanfiction idea could be that Sasuke in the Anbu discovers a conspiracy within the village that even Naruto as Hokage is unaware of. Sasuke then has to decide whether to go to Naruto directly or investigate further on his own. This would create a lot of tension and drama, as Sasuke's loyalty to the village and his relationship with Naruto are both at stake.
One possible scenario in such a fanfiction could be Naruto as Hokage having to deal with political situations in the village while Sasuke, as an Anbu, is sent on dangerous covert missions. Naruto might rely on Sasuke's intelligence and combat skills from his Anbu work to protect the village from external threats. They could also have some internal conflicts due to their different roles and the secrecy associated with Sasuke's Anbu work.
In a fanfic scenario, Naruto as Hokage might have some concerns about Sasuke being in the Anbu. He could worry that Sasuke's past and his more solitary nature might not fit well with the Anbu's group dynamics. However, Sasuke proves himself by using his unique skills and insights to protect the village. Meanwhile, Naruto tries to integrate Sasuke more into the village's core, leading to some interesting character - development moments for both of them.
Their relationship would be one of mutual respect. Naruto, as Hokage, would trust Sasuke's abilities as an Anbu member. Sasuke, on the other hand, would respect Naruto's leadership. They would be comrades again, but with a new dynamic due to their different positions in the village.
One idea for the main plot is that a group of rogue ninjas has developed a new and dangerous jutsu that can disrupt the balance of power in the ninja world. Naruto, in his role as Hokage, decides to take action. Sasuke, as an Anbu, is sent to infiltrate the group. As Sasuke gets closer to the truth, he finds that the leader of the rogue ninjas has a personal vendetta against Naruto. This forces Sasuke to race against time to stop the jutsu and protect Naruto and the village. Along the way, Sasuke also has to come to terms with his own past actions and how they might affect the current situation.
One common theme is redemption. Sasuke, having had a troubled past, may find redemption through his work as an ANBU under Naruto's leadership as hokage. Another theme is friendship. Despite their past differences, they rekindle their friendship in many of these stories. Also, protection of the village is a big theme. Naruto as the hokage and Sasuke as an ANBU are both committed to safeguarding the village from all threats.
Maybe there's a threat from a long - forgotten enemy. Naruto, as Hokage, has to mobilize the village's forces, including Sasuke in the Anbu. Sasuke discovers some old secrets related to this enemy that could change the course of the battle. They then have to race against time to use this knowledge to their advantage. This could involve Sasuke going on solo missions within enemy territory while Naruto holds the fort at home and plans the overall strategy.
Perhaps in the fanfiction, there's a prophecy that only Hokage Naruto and Anbu Sasuke can fulfill together. They have to embark on a dangerous journey outside the village to prevent a great disaster. Along the way, they face many challenges that test their friendship and skills. For instance, they might have to fight against ancient and powerful creatures. This would not only show their combat abilities but also how they support each other in difficult situations.
One idea could be Sasuke leading an Anbu mission while Naruto, as Hokage, has to deal with the political fallout of the mission's actions. For example, if the Anbu under Sasuke's command accidentally cross a border during a pursuit, Naruto has to smooth things over with the neighboring village.
One popular type of hokage naruto x anbu sasuke fanfiction often involves them teaming up on a dangerous mission. In these stories, Naruto, as the hokage, has to rely on Sasuke's skills as an ANBU member. They might start off a bit rough due to their past differences but gradually grow closer as they face various challenges together. For example, they could be up against a new and powerful enemy that threatens the village, and their combined strength is the only hope for victory.