Yes. There is a story about a training ground where a soldier had a fatal accident during a drill. Ever since then, trainees have reported seeing a figure that resembles the fallen soldier during their training sessions. They say the figure appears suddenly and then vanishes just as quickly.
Perhaps he's been influenced by someone who gives him bad advice. For example, if someone tells him that natural talent is enough and training is overrated. Also, he could be dealing with some personal problems, like a conflict within his family or among his friends that takes up all his time and mental energy, causing him to neglect training.
In this fanfiction, Hokage Naruto might take Naruto to a special training ground. There, he could teach Naruto some of his own unique jutsu combinations. For example, he could show Naruto how to combine the Rasengan with his Sage Mode more effectively. This would give Naruto a huge power boost and also make him more confident in battles against tougher opponents.
Ancient hunting grounds were usually a wide field surrounded by fences or barriers to prevent prey from escaping. In the center of the field, there would usually be a large bonfire or a campfire. The hunters would sit around the bonfire and drink while waiting for their prey to appear.
Hunters 'huts or tents were usually set up around the site. These huts or tents were used for living, preparing food, and supplying water. At the same time, there would be many outposts set up around the venue to monitor the location and movements of the prey.
In the center of the hunting ground, there were usually many traps set up to capture prey. These traps could be natural or man-made. The type and number of traps depended on the target species and the preferences of the hunters.
Hunters usually used various weapons and tools such as bows and arrows, traps, swords, etc. to attack and capture prey. Hunters would also work together to catch prey.
The ancient hunting grounds were a complex and dangerous place. Hunters needed to have good hunting skills and cooperation to successfully capture prey.
It could be due to the current situation in the village. There might be threats that required Naruto to stay. Tsunade, as the Hokage, had to consider the overall safety and stability of the village. So, she denied Naruto's request for the training trip to ensure he was available in case of any emergency.
Well, in the 3 - year training fanfiction, Naruto could also have some intense mental growth. He might learn more about the history of his clan and the ninja world from Jiraiya. This knowledge would not only make him a better ninja but also shape his understanding of his place in the world and his responsibilities.
Perhaps it's an old enemy who has a change of heart. This enemy could think that by training Naruto, they can make amends for their past wrongs. But Naruto, being cautious, denies the offer as he still has doubts about this former foe's true intentions.
In this fanfiction scenario, Naruto might learn unique chakra control techniques from Sarutobi. Sarutobi, being an experienced ninja, could teach Naruto how to better manage his large chakra reserves. This would lead to Naruto being able to perform jutsus more efficiently and with less waste of chakra.
Well, the result might be a fanfic that better adheres to the Naruto universe's rules and lore. For example, if the training focused on jutsu usage, the fanfic could then accurately describe how Naruto or other characters perform their jutsus. It could also result in a more immersive experience for the readers as the writing style gets polished during the training process.