In a kratos vs naruto fanfic battle, Naruto might have a chance if he uses his strategic thinking. He could use his shadow clones to surround Kratos and then attack from all sides. But Kratos is no pushover. His experience in combat is vast. He has fought against opponents with all kinds of powers. If he manages to break through Naruto's clones and get to the real Naruto, it could be over. However, Naruto also has his sage mode which gives him enhanced strength and perception. So it's a very tough call.
One idea could be a battle in a neutral dimension. Kratos, with his brute strength and god - slaying weapons, faces Naruto's ninjutsu and his ability to summon powerful creatures. Another idea is that they are forced to team up against a common enemy that threatens both their worlds. They start off clashing due to their different fighting styles and beliefs but gradually learn to work together.
Well, it really depends on how the fanfiction is written. If the writer decides to give Percy some new powers or boost his existing ones, he could stand a chance against Kratos. However, Kratos is a force to be reckoned with. He's faced the most terrifying foes in his own universe. Percy is used to fighting monsters in the world of Greek mythology, but Kratos has fought gods on their own turf. So generally, Kratos has more of an advantage.
The World Serpent in God of War is a massive and ancient creature. It's often associated with Norse mythology within the game. It has a very intimidating presence and is a significant part of the game's world - building. Kratos and Atreus encounter it during their journey, and its existence adds to the overall mystery and grandeur of the game's lore.
One interesting plot twist could be that Percy discovers a way to nullify Kratos' god - given powers. Maybe he finds an ancient artifact during the fight that has the ability to do so. Another could be that Kratos, instead of seeing Percy as an enemy, realizes they have a common goal against a greater evil in the fanfiction world and they end up teaming up.
Naboo was a terrifying giant snake from legends. It was said to be at least 30 meters long, with a dragon-like head and seven nostrils. Nabu's existence was mentioned in ancient legends in Malaysia, but no one had ever seen this animal in real life. In ancient Chinese legends, the oral records of the Amazon tribes, and historical materials from other places, there were also giant snakes. The known giant land snake was a boa, which lived in tropical rainforests. The largest boa was about 26 meters long and 1.2 meters wide after its bones were restored. There was not much evidence of giant snakes in the sea, but there were reports that in 1937, fishermen in Iceland saw a giant snake that swam quickly under the sea surface. It was estimated to be about 30 meters long. At present, the information about the Naboo giant snake mainly came from legends and ancient records. There was no conclusive scientific evidence to prove its existence.
The Giant Serpent was a character from Norse mythology, known as Jormungand. It was the son of Loki and the female giant Angelborda, and the brother of the Death Goddess Hale and the giant wolf Fendril. Jermungander was thrown into the ocean of the human world by Odin, but it grew there and became so large that it could circle the earth and bite its own tail. Therefore, it was called the " World Serpent." Thor became the archenemy of Jemengard. I don't know much about the Giant Serpent.
I'm not sure about the exact main characters. But it's likely to have characters who are brave enough to face the world - devouring serpent. Maybe a young hero or a wise old sage.