It could also be about power. Percy might realize that with Zeus out of the way, he can reshape the world of the gods in a more just and fair way. He could believe that Zeus's rule is corrupt and that killing him is the only way to bring about real change.
One possible plot could be that Zeus somehow gets involved in the Naruto universe and starts causing chaos. Naruto, being the hero, decides to take him on. He could use his shadow clone jutsu to confuse Zeus and then land a powerful Rasengan on him. Maybe Zeus underestimates Naruto's abilities and is caught off guard, leading to his defeat.
Well, it's not a very common theme. Naruto is from the Naruto universe and Zeus is from Greek mythology. Their worlds are quite different. But in the realm of fanfiction, some creative minds might come up with such a scenario where Naruto, with his ninja skills and powers, somehow manages to kill Zeus. However, it's more of a wild and out - there idea that might appeal to those who like to mash up different fictional universes in a rather extreme way.
Some gods might be neutral. They would be more concerned with how this event would disrupt the balance of power among the gods. They might try to negotiate or find a compromise to avoid further bloodshed and chaos in the world of the gods.
On the other hand, Percy could become more of a revolutionary figure. His act of killing Zeus could inspire other demigods to stand up against the unjust ways of the gods, and Percy would have to step into a leadership role, which would force him to grow in terms of strategy and diplomacy.
One possible plot could be that the entire Greek pantheon is thrown into chaos. Percy might be seen as a huge threat, and other gods and goddesses would either try to hunt him down or form alliances with him out of fear or a desire for power. Demigods would be forced to take sides, leading to massive battles among them.
Tyrion Lannister. He is known for his wit and political acumen. Meeting Kratos, a powerful and straightforward warrior, would create an interesting dynamic. Tyrion might try to use Kratos for his own political games or just be fascinated by his stories of battles from another world.