Perhaps it's related to some ancient ninja art or a hidden power within Naruto himself that gets awakened. In the Naruto universe, there are often latent powers waiting to be discovered. This Hercules - like strength could be tied to his Uzumaki heritage or some long - forgotten jutsu. He may initially struggle with this new power, not knowing how to fully utilize it without causing harm to himself or others. But as the story progresses, he learns to master it.
Naruto would likely become more confident. His Hercules strength would give him an extra boost in battles and he'd start to believe in himself even more. He might also become a bit more reckless at first, thinking his strength can solve all problems.
Well, perhaps the story could revolve around a tournament. Naruto, with his Hercules strength, enters this grand tournament. He has to face opponents who are also extremely powerful. His strength gives him an edge, but he also has to learn to control it. Along the way, he meets new allies and they all have different motives related to the tournament.
Enemies might target him more. With such great strength, he would be seen as a huge threat. Other ninja villages or evil organizations might try to eliminate him or steal his power. He would have to constantly be on guard and develop new strategies to defend himself.
Maybe Hercules is somehow sent to the Naruto universe. He would be this super - strong figure among the ninjas. He could learn some ninja techniques, like how to use chakra, which is different from his own strength. And his great strength could also be an asset in the battles in the Naruto world, especially against the big - bad villains like Pain.
In a Naruto - Hercules crossover fanfiction, the story could center around the values both characters represent. Hercules is known for his heroism and physical strength, while Naruto is about never giving up and his strong bonds with friends. So, perhaps they meet and learn from each other. Naruto could teach Hercules about the power of friendship and believing in oneself even without having god - like powers, and Hercules could show Naruto how to use his physical strength more effectively. They could then team up to fight a common enemy that threatens both their worlds.
Naruto's ability to use chakra and perform ninjutsu like the Rasengan could be combined with Hercules' brute strength. For instance, Naruto could use his chakra to enhance Hercules' strength even further, or Hercules could use his strength to create a more powerful impact when Naruto uses his jutsu. Maybe Naruto creates a Rasengan and Hercules throws it with his superhuman force.
Perhaps it could be a character who is jealous of both Naruto and Hercules. A sorcerer who was once shunned in both worlds and now wants to prove himself by defeating them. He could use dark magic to create chaos and try to stop Naruto and Hercules from uniting and using their combined powers.
One consequence could be that his friends and allies start to see him in a different light. They might be in awe of his new power, which could create a bit of a distance between them at first. For example, some of his less - powerful friends might feel a bit inferior or intimidated.
Megara is an obvious choice. She has a complex relationship with Hercules and can add a lot of drama and emotional depth. Philoctetes, Hercules' trainer, is also great. He can provide wisdom and comedic moments. Then there are the gods and goddesses like Zeus, Hera, and Aphrodite. Each of them can bring their own motives and powers into the story. Also, including some original characters like a young boy who idolizes Hercules and follows him on his adventures could be interesting.