If Percy revives Kronos in fanfiction, it could lead to a huge power struggle. Kronos is a very powerful and malevolent force. Percy might think he can control Kronos or use him for some purpose, but it would likely backfire. The gods would be enraged and see Percy as a traitor. It would also put Percy's friends in great danger as Kronos would surely seek to destroy those who oppose him.
In a fanfiction where Percy revives Kronos, it could be a really interesting plot twist. Maybe Percy is tricked into it by some dark magic or false promises. Once Kronos is revived, he might start to corrupt Percy, slowly turning him to the dark side. Or perhaps Percy has a grand plan to use Kronos to change the whole power dynamic between the gods and demigods, but it's a very risky move.
If Percy Jackson joins Kronos in fanfiction, it would be a huge deviation from the original story. Percy is a hero who stands for good, and Kronos is a villain. This could lead to a very dark and twisted version of the Percy Jackson universe, with Percy using his powers to aid Kronos in his evil plans, perhaps causing chaos among the gods and other demigods.
Well, perhaps Percy discovers a way to revive Kronos out of desperation to right some past wrongs in the new age. Maybe he thinks Kronos can help against a new, greater threat.
In a fanfiction where Percy gains all of Kronos' powers, he would likely become extremely powerful. He could have control over time, which is one of Kronos' major abilities. This might lead to him being able to manipulate events in ways no one else could. For example, he could go back in time to prevent disasters or change the outcome of battles.
Kronos himself could be the main antagonist. Even if Percy revives him with good intentions, Kronos' nature might be too power - hungry and evil to be controlled.
Well, in this fanfiction, Percy might face a huge moral dilemma. Since Kronos is a villain, Percy joining him could be a really dark turn. Maybe he's been tricked or is trying to stop Kronos from the inside. It could lead to some intense battles within the Titan's ranks as Percy tries to figure out his true loyalties.
Well, Kronos is a very powerful and evil figure. If he takes over Percy in fanfiction, Percy might be forced to do a lot of bad things against his will. His friends would likely be in great danger as Percy, under Kronos' control, could turn on them. Kronos could use Percy's powers to cause chaos and destruction in the world of the Gods and demigods.
In a fanfiction where Naruto revives Kaguya, it could lead to chaos. Kaguya was extremely powerful and her revival might put the ninja world in danger again. Naruto might have his reasons, like seeking more knowledge about the origin of chakra, but he would also have to face the consequences of bringing back such a powerful and potentially malevolent force.
In fanfiction, when Percy meets Kronos in Tartarus, it could be a battle of wits. Percy has faced many challenges before and learned from them. Kronos, on the other hand, is cunning. Percy might try to outsmart Kronos by using the chaotic nature of Tartarus against him. He could lead Kronos into a trap where the very essence of Tartarus, like the rivers of fire or the howling winds, would weaken the Titan.
Well, in such a fanfiction, Percy's character arc would be completely transformed. Instead of having the connection to the sea like in the original where he's Poseidon's son, he might have a connection to time or something related to Kronos' powers. His relationships with other characters would also be different. For example, his friendship with Annabeth might be strained as she might see him as a threat due to his new 'parentage'. The story could be filled with internal struggles as Percy tries to come to terms with who he really is and the legacy of Kronos.
In a fanfic scenario where Percy Jackson joins Kronos, it could be a very interesting exploration of the 'what - ifs'. Percy has a strong sense of justice, so for him to side with Kronos, Kronos must have presented a very convincing argument. It could be that Kronos showed Percy a future where the demigods are constantly oppressed by the Olympians. However, this would also mean Percy has to go against his instincts and the relationships he has built. His friends like Annabeth would be in shock and try to bring him back to the right side. This could lead to some intense battles not only between the demigods and Kronos' forces but also within Percy himself as he struggles with his new allegiance.