Who could be the main villain in a 'Cory in the House' and 'Shrek' fanfic?

One possible plot could be that Cory somehow gets transported to the world of Shrek. Maybe he's on a mission from the White House to find a special magical item that's rumored to be in Shrek's swamp. Along the way, he teams up with Shrek and Donkey. They face challenges like trying to outwit Lord Farquaad, who also wants the item for his own evil plans. Cory uses his street - smart skills from living in the city to help them navigate through tricky situations.

Perhaps it's a new character, like an evil wizard who has heard about the power of Shrek's family. He believes that by getting rid of the ogre babies, he can gain control over the swamp and all of Far Far Away. So he devises various evil plans to harm them.

A new character could be introduced as the main villain. This character could be someone from an ancient clan that was once in control of the 10 - tailed beast but lost it. Now, seeing Naruto with that power, they want it back and will stop at nothing to get it. They could have unique powers and abilities that make them a formidable foe for Naruto and his friends.

It could be a resurrected Orochimaru. He has always had an interest in power and the Akatsuki. He might return, more powerful than ever, and take control of the Akatsuki in the Boruto era, using them to carry out his evil plans, like creating an army of super - ninjas using some dark jutsu.

It could be a new character, a powerful dark wizard who wants to use the combined power of Naruto's chakra and Pikachu's electricity for his own evil purposes. He creates all sorts of dark creatures and sends them after Naruto and Pikachu to try and capture them. He's very cunning and has a lot of minions to do his bidding.

It could be a rogue ninja from the village with the Tenshikage. Maybe he's jealous of the Tenshikage's power and wants to take it for himself. He could be causing chaos in the village, stealing important ninja scrolls and attacking innocent villagers.

Obviously, Dracula himself could be the main villain. He has all the classic powers like turning into a bat, super strength, and mind control. He could use these powers to try and take over the world or at least the area where Ben is currently located.

Lex Luthor would be a great choice. He could be plotting against both Batman and Supergirl. He might try to use his intellect to create a weapon that can nullify Supergirl's powers and outwit Batman's strategies at the same time.

Maybe an ancient evil spirit that has been awakened due to some mistake. It targets Ageha because she has a pure and powerful chakra. Naruto, being the hero he is, tries to fight the spirit, but he quickly realizes that he needs Ageha's help as well as the help of all his friends to defeat this powerful foe.

There could be a group of rogue Huntsmen who believe that the current system of protecting the world is flawed. They form a radical organization and start causing chaos. Their leader, who is a very powerful and charismatic character, could be the main villain. They would have their own set of ideals and be willing to do whatever it takes to achieve their goals, even if it means going against the established order.