Who could be the main villain in a 'Percy Jackson Infinity Gauntlet' fanfiction?

Well, it could be about Percy finding the Infinity Gauntlet in the world of Greek mythology. Maybe he has to figure out how to use its power without being corrupted by it, all while facing off against some of the most powerful Greek monsters and gods who also want the gauntlet for their own purposes.

The main villain could be an ancient Titan who was imprisoned long ago but has now found a way to break free. This Titan could be seeking revenge on the gods and demigods alike, and Percy and his friends would have to stop him before he destroys the world as they know it.

If Percy Jackson had the Infinity Gauntlet in fanfiction, it would completely change the power dynamics. He might use the Reality Stone to create illusions or change the nature of things around him. For example, he could turn the sea into a solid surface for his enemies to struggle on. And with the Power Stone, his physical strength would be off the charts, allowing him to take on even the mightiest of foes with ease.

Madara Uchiha could be a great antagonist. He already has powerful jutsu and a thirst for power. If he gets wind of the Infinity Gauntlet, he would surely try to take it for himself to achieve his goal of creating a world under his control.

Kronos could make a comeback. Even though he was defeated before, he could find a way to return in a more powerful and vengeful form. He could be the mastermind behind the apocalypse, seeking to finally destroy the gods and take over the world once and for all.

Maybe a group of rogue nymphs who are angry at how the demigods have been treating the natural world. They trap Percy as a warning to the other demigods, and he has to negotiate with them and find a way to make amends for the actions of his kind.

Maybe a new type of monster that is created or awakened during the eclipse. This monster could be immune to most of the demigods' powers during the eclipse, making it a very difficult foe. It could have the ability to manipulate shadows, which are stronger during the eclipse, and use them to its advantage in battles against Percy and his friends.

Perhaps a minor god who is jealous of the attention the major gods get. This god decides to cause trouble at the zoo. He could be the one responsible for making the magical creatures in the zoo act up. He would try to stop Percy from uncovering his plans and restoring order at the zoo. He might have some strange powers related to the natural elements found in a zoo, like the ability to make plants grow wildly to entangle Percy or make the water in the ponds turn into quicksand - like substances.

It could be Kronos again, but in a more powerful and resurrected form. He might have found a way to come back even stronger after his previous defeat and now has a new plan to take over the world of gods and demigods.

Maybe a group of rogue demigods who have decided to take over the Hollow for their own purposes. They could be using the resources of the Hollow in a wrong way, like trying to extract its magic to make themselves more powerful. They would be a formidable foe as they have demigod abilities.