One interesting storyline could be the guild master leading the Naruto characters on a new and dangerous mission outside of the main Naruto plot. Maybe they are exploring a mysterious land filled with unknown ninja techniques.
One interesting storyline could be Naruto being trained by a Jedi Master in a world where the Force and chakra co - exist. He might learn to combine his ninja skills with lightsaber combat. For example, using his Shadow Clone Jutsu to create multiple decoys while attacking with a lightsaber. Another could be Naruto using the Force to enhance his Sage Mode, allowing him to sense threats from a greater distance.
One interesting storyline could be a human character's journey to regain their family's lost honor. They might face various challenges in the world of Guild Wars 2, like dealing with rival factions or uncovering ancient secrets. Another could be a love story between two humans from different social classes, which is made difficult by the political and social structure of their society in the game.
One interesting storyline could be a young ninja who discovers they have an innate ability to master the Sharingan at an extraordinary rate. They might then face challenges from jealous rivals within their own village who fear their growing power. Another could be a Sharingan master who has lost their sight due to overuse of the Sharingan but discovers a new way to 'see' through chakra perception, leading to a whole new set of adventures.
One interesting story could be about a new character joining the Naruto guild and having to prove themselves. They might face challenges like difficult missions or rivalries within the guild.
One possible interesting plot could be Naruto, as the guild master, having to deal with a powerful dark guild that is threatening the safety of Fairy Tail. He could use his ninja skills and leadership to gather the members and come up with a unique battle strategy.
Another great choice could be Laxus. He has that tough - guy exterior but also a lot of room for character growth. In a fanfiction as guild master, he could bring a different leadership style, more aggressive perhaps. He might change some of the guild's traditions while still maintaining the core values of Fairy Tail. He also has a great relationship with his team, which could be further developed in the fanfiction.
One interesting storyline could be about a new member joining the True Heart Guild in the Fairy Tail universe. This new member might have a unique magic ability that no one has seen before, and they struggle to fit in while also trying to prove their worth to the guild. Another could be a story where the True Heart Guild goes on a quest to find a lost magical artifact that has the power to either save or destroy the Fairy Tail world. It could involve lots of battles and character development along the way.
In some naruto dark guild fanfiction, there might be a plot where the dark guild is secretly working with rogue ninjas to create chaos in the ninja world. They could be trying to disrupt the balance of power between the villages. For example, they might start false rumors about one village attacking another to incite war. This would force Naruto and his friends to not only deal with the physical threats but also the political unrest caused by the dark guild's actions.
One great storyline could be Naruto exploring new fire - based jutsu. He might discover an ancient scroll that contains a powerful fire jutsu and has to go on a journey to master it. Along the way, he could face challenges from other ninja clans who also want the power. Another could be Naruto teaching his fire - based skills to the new generation of Konoha ninja, like how he imparts his knowledge and the unique ways he has developed to control and enhance fire techniques.
Kakashi could be a great guild master. He's already a highly skilled and respected ninja in the Naruto world. His knowledge of various jutsu and his experience in leading teams would make him a natural fit for the role of guild master.