Maybe Danny finding out that a human he trusted all along was actually working with the ghosts in secret. This unexpected circumstance would create a lot of tension. He would have to re - evaluate his relationships and face new threats. It could also lead to a moral dilemma for Danny as he decides how to deal with this betrayal.
In some fanfictions, an unexpected circumstance could be that the Ghost Zone merges with the human world. This would be a huge upheaval. Danny would have to not only deal with the chaos of the two worlds colliding but also find a way to separate them. It would bring together all the characters, both human and ghost, in a whole new way and create countless new plot possibilities.
One example could be Danny suddenly losing his powers in a fanfiction. This would completely change the dynamic of his battles and how he interacts with the ghosts. It's an unexpected turn that can lead to new storylines like him having to rely on his friends and human skills more.
They can also introduce new themes. Say, an unexpected time - travel event occurs in the fanfiction. Danny could end up in the past or future of the Danny Phantom world. This would allow the exploration of different eras of the story's setting, different versions of characters, and how Danny's actions in this new time affect the overall timeline.
One unexpected situation could be Danny revealing his identity to the whole town not by accident but on purpose to gain their trust in a time of great danger. For example, a powerful ghost is threatening to destroy the town and Danny thinks that if the people know who he is, they can work together better to fight the threat.
In some Twilight fanfics, unexpected circumstances might involve a new vampire coven arriving in Forks. This could disrupt the existing power dynamics between the Cullens and the local vampires. Also, an unexpected natural disaster could force the vampires and humans to work together in ways they never thought possible.
One aspect that could make it unique is the way it blends different genres. Perhaps it combines horror elements from the Danny Phantom universe with some comical situations in an unexpected way. Also, the fanfiction might introduce new settings or backstories for the characters that are not in the original, making it stand out.
They can also introduce new plot twists. Say Danny finds out he has a long - lost sibling who is also a half - ghost. This completely changes the family dynamic and the story's direction. It allows for exploring new relationships and character growth that might not have been possible without this unexpected situation.
Some fanfictions might focus on the origin of Danny's obsession with the Demigheist. Maybe it started from a chance encounter where Danny saw the Demigheist's unique powers and was intrigued. In these stories, the author could delve deep into Danny's psyche, showing how this obsession grows over time and how it affects his relationships with his friends and family.
In some fanfictions, Danny could be abused by the ghosts he fights. For instance, a powerful ghost might constantly taunt him about his weaknesses and failures, which wears down his mental state over time and results in depression. He then has to find ways to overcome both the external threats and his internal emotional turmoil.
I recommend " The Invincible Attack and Defense of Online Games " to you. At the beginning of this novel, the protagonist was fired by his company. Then, he happened to encounter a virtual online game jointly designed by the world's seven superpowers. He bought a gaming helmet and entered the game, thus starting an exciting journey. Later on, he met two bad guys and ended up dying together. Then, he received the gaming helmet when it was released and began a new life in the game. I hope you will like this novel.
One idea could be that Danny gets an illness that affects his ghost powers. For example, he might start losing control over his intangibility or invisibility. This could lead to some really comical or dangerous situations. Another idea is that his friends try to find a cure for his strange ghost - related illness while also keeping it a secret from the town.
One interesting story could be about Danny and Sam going on a ghost - hunting adventure together. They might discover a new type of ghost that has unique powers and they have to figure out how to defeat it using their combined skills.