Who might be the main antagonist in 'The Real Young Miss Secret Identity Revealed Novel'?

Maybe her true family background will be revealed. For example, she might be the long - lost heir of a wealthy family.

Perhaps Doctor Octopus. Knowing who Spider - Man really is, he might use his intelligence and his mechanical arms to create elaborate traps for Peter Parker at his home or workplace. He could also try to expose Spider - Man's secrets further to the public and turn the public against him.

Obviously, all of the Avengers would be affected. But characters like Iron Man/Tony Stark would be a big focus. His playboy billionaire image could be completely changed in the public eye once his superhero identity is out. Also, Spider - Man if he's part of the Avengers in the fanfiction. His young age and normal life with Aunt May would be greatly disrupted.

It could be a new dark wizard who is secretly operating within Hogwarts. He might be trying to steal powerful magical artifacts and Harry and Luna get in his way.

It could be a powerful dark mage who controls the tunnels and doesn't want the priestess to succeed in her mission.

It could be an old sage or a hermit who has been watching Naruto from afar. They might decide that the time is right to reveal the secret to Naruto himself or to those around him for the greater good of the ninja world.

It could be secrets about a character's past, like a hidden identity or a past crime they committed.

It could also be Kakashi. There might be fanfictions where he has some secrets related to Naruto. For instance, he might be aware of a secret mission related to Naruto that he has been keeping from everyone, which could be a major plot point in the fanfiction.

It could be Gabriel Agreste. He has been a suspect in the original series for various reasons. He is often absent and has a lot of secrets. So in the fanfiction, it would make sense if he was finally revealed as Hawk Moth.

Obviously, Batman/Bruce Wayne himself. His butler Alfred would also be heavily involved as he has always been there to support Bruce. Alfred would likely be trying to protect Bruce and keep his remaining secrets safe.