A really interesting plot could be that Gaara discovers a plot against Naruto's life by an underground organization. Gaara then goes undercover in the organization to gather information and protect Naruto. Along the way, he has to face his own inner demons as he has to pretend to be someone he's not. Meanwhile, Naruto is oblivious to the danger he's in, and Gaara has to make sure he doesn't blow his cover while still keeping Naruto safe. This could lead to some really tense and emotional scenes in the fanfiction.
Perhaps in the fanfiction, Gaara, being Naruto's protective brother, steps in when Naruto is facing political opposition in the Hidden Leaf Village. Gaara uses his influence as the Kazekage to support Naruto and prevent any harm from coming to him. He might also accompany Naruto on diplomatic missions to other villages, where his presence acts as a deterrent to those who might want to target Naruto. In addition, Gaara could teach Naruto some of the unique desert survival skills that come with being from the Sand Village.
One plot idea could be that Gaara, as Naruto's protective brother, uses his sand powers to shield Naruto from various attacks during a major battle against a new and powerful enemy. For example, when the enemy launches a surprise attack on Naruto, Gaara quickly forms a sand barrier around him, saving his life. Another idea is that Gaara helps Naruto train in secret to master a new technique. He shares his own experiences with controlling power, which Naruto can relate to with his Nine - Tails chakra.
Perhaps there's a plot where Naruto is framed for a crime that could lead to his expulsion from the ninja world. Gaara, believing in Naruto's innocence, launches an investigation on his own. He uncovers the real culprits and presents the evidence to the ninja council, all while protecting Naruto from any harm that might come his way during the process. Gaara's protective nature also extends to Naruto's emotional well - being. When Naruto is feeling down about not being able to achieve a certain goal, Gaara is there to offer words of encouragement and support.
One plot idea could be that Naruto's sister is a target of a powerful enemy because of her unique abilities. Naruto would then go to great lengths to keep her safe, like setting up hidden shelters and training her in self - defense. Another could be that she is being bullied in the village because of her relation to Naruto, and he steps in to make sure it stops and that she is accepted.
One idea could be that their pregnancies bring the two villages closer together. With Fem Naruto and Gaara both expecting, it could lead to a new era of peace as the two most powerful ninja from their respective villages are about to become parents. This could involve joint efforts in protecting the future of their children, like creating a new safe haven for the new generation.
One example could be a story where Naruto is in a dangerous mission and Gaara shows up unexpectedly to protect him. Gaara uses his sand powers to shield Naruto from enemy attacks, showing his loyalty and protectiveness.
One plot idea could be that Naruto and Sasuke grow up knowing they are brothers. They train together secretly, combining Naruto's Uzumaki stamina and Sasuke's Sharingan abilities. This leads to them creating unique jutsu. Another could be that their brotherhood is a secret from the village, and they have to protect this secret while still trying to save the village from threats.
One plot idea could be a story where Gaara, Naruto, and a third character, say Sasuke, are on a mission together to protect a hidden village from a new and powerful enemy. They have to learn to combine their unique skills and overcome their differences to succeed.
Another idea is Naruto helping Gaara control his tailed beast better. Naruto, having a tailed beast of his own, could share his techniques and experiences. He might take Gaara to a secluded place where they can practice without any distractions. This would not only strengthen Gaara's control but also deepen their bond as they face similar challenges.
One plot idea could be that Naruto realizes his love for Gaara during a joint mission. They face a powerful enemy together and Naruto starts to see Gaara in a new light, not just as a friend but as someone he has deeper feelings for. As they fight side by side, Naruto's protective instincts grow stronger.
In a fanfiction, Naruto could hug Gaara after Gaara reveals some of his insecurities about his past and how he's feared in his village. Naruto's hug would be a way to show that he doesn't see Gaara that way and that he believes in his redemption and growth.
One idea could be that Evil Naruto teams up with Gaara to take over the Hidden Leaf. They use their combined power to challenge the existing leadership. Another could be a story where they are pitted against each other in a battle of wills, with Evil Naruto trying to corrupt Gaara further.