It could be a mad scientist who wants to study Beast Boy in his beast form and keep him caged for experiments.
There might be a group of hunters who see Beast Boy as a dangerous monster. They don't understand that he's still part - human and has a good side. They hunt him down, thinking they are protecting the city. This would create a conflict where Beast Boy has to prove that he's not a mindless beast while also trying to avoid getting killed by these hunters.
Well, perhaps it could be about Beast Boy losing control over his powers and fully becoming the beast all the time. Maybe there's a curse or some dark magic at play that forces him into this state.
The Hive Five could also be the main villains. They might be jealous of Beast Boy's growth and potential. They could team up and try to take him down. Each member of the Hive Five has their own unique abilities that could pose a challenge to Beast Boy. For example, Jinx could use her bad luck powers to disrupt Beast Boy's transformations, while Gizmo could create technological traps to catch him.
A possible ally could be a character with healing powers. Since Beast Boy often gets into dangerous situations while using his shapeshifting, someone who can heal his injuries would be very useful. For example, a healer who can also communicate with animals on a spiritual level, similar to Beast Boy's connection to them.
There could be an evil sorcerer as one of the main antagonists. This sorcerer might be after Raven's powers for his own dark purposes. He could use his magic to create all sorts of obstacles for Beast Boy and Raven.
The Joker could be an antagonist even when Batman becomes a god. He might see Batman's new status as a challenge and try to bring him down to his level through his usual chaotic and insane methods. Maybe he'd try to drive Batman mad with the idea that his new powers make him no better than the villains he fights.
A 'Beast Boy Full Potential Fanfic' could take him on a journey of self - discovery. He could travel to different dimensions or places on Earth that are full of unique animals. By interacting with these animals, he learns to harness their essence and add it to his transformation abilities. He could also meet other shape - shifters and learn from them. This would lead to him evolving his powers to a level where he can even combine multiple animal traits in one form, like having the speed of a cheetah and the strength of a gorilla at the same time.
A 'beast boy x raven lonely beast fanfic' could be full of emotional depth. Since Raven often has a complex and somewhat withdrawn nature, and Beast Boy is more outgoing. In this fic, their dynamic might be about Beast Boy bringing out a different side of Raven. It could also involve some kind of adventure or situation where they have to rely on each other, especially when Raven is in her 'lonely beast' form which might come with its own set of powers and challenges.
Well, an important character could be the scientist or the person responsible for Beast Boy's powers if his origin is due to some experiment. This character could be either a friend or a foe in the story. There may also be some sidekick characters who look up to Beast Boy and learn from him. These characters can add a bit of humor and light - heartedness to the graphic novel. And don't forget any magical or otherworldly beings that might interact with Beast Boy, like a powerful wizard or an alien entity that plays a role in the story.
Well, Cyborg could also be a main character. He and Beast Boy are good friends, and Cyborg might have to adjust to his friend's new appearance and the changes that come with it. And then there's Robin. As the leader, he would need to deal with how Beast Boy's transformation affects the team dynamics. Maybe he has to figure out new strategies that take into account Beast Boy's new situation.
Obviously, Beast Boy is likely to be one of the main characters. Since it's in the title, he's probably at the center of the story. He could be the one wearing the mask and dealing with whatever situations it brings.