In reality, Warrior MMA is purely fictional. It's designed to entertain through imaginative scenarios and characters rather than being based on actual happenings.
One great story is about Anderson Silva. He had a remarkable reign as UFC middleweight champion. His unorthodox striking style and ability to finish fights in spectacular ways made him a legend. For example, his front kick knockout of Vitor Belfort was iconic.
The plot could revolve around Percy trying to keep his identity as a demigod a secret while competing in MMA. He would have to constantly balance his normal life and his demigod powers. Maybe there's a tournament where the final opponent is someone who knows his secret and is out to expose him or defeat him in a more sinister way. And along the way, he could make some new friends or allies within the MMA world who help him keep his secret.
Yes, Demetrious Johnson. He was often overlooked early in his career. But he persevered and became one of the greatest flyweights. He had to work hard to prove himself against fighters who didn't always take him seriously. His precise striking and amazing grappling skills led him to a long and successful title reign.
One opponent could be a child of Ares. Since Ares is the god of war in Greek mythology, his descendants would likely be fierce fighters. They would have a natural inclination towards combat and would be a great challenge for Percy. Another could be a monster in disguise. Maybe a minotaur that has learned to fight in the MMA style. It would be a very dangerous and unpredictable opponent for Percy.
First, make sure to have a strong opening. Hook the reader right away. A good way is to start with a question or a statement that makes them curious. For example, 'What if the world stopped spinning?' Then, build the story around a central conflict. It could be a person vs. person, person vs. society, or person vs. nature conflict. And always keep your audience in mind. If you're writing for children, use simple language and a more straightforward plot. If it's for adults, you can be more complex in your themes and language.