Who could be the main villain in 'Percy Jackson Broken Bones Fanfiction'?

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.

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.

Maybe a powerful Titan who has somehow managed to get hold of the super soldier technology. They could use it to create an army of super - powered minions and try to take over Olympus again. This would force Percy and his friends to not only fight the Titan but also the super - powered forces.

It could be another Titan who opposes the idea of balance. Maybe a Titan who wants to tip the scales in their favor and create chaos. This Titan could see Percy as a threat to their plans and constantly try to stop him from achieving balance.

A likely main villain could be Kronos. He's always been after power and the Infinity Gauntlet would be the ultimate tool for him to finally overthrow the Olympians and rule over everything. He could sense the power of the gauntlet and do whatever it takes to get his hands on it.

A great main villain could be a rogue demigod who has found a way to corrupt the power of the hidden blades. This demigod could be jealous of Percy's fame and power and uses the blades to create chaos among the demigod community. He might be using the blades to steal the powers of other demigods, making him stronger with each theft.