Well, in some Danny Phantom blood fanfiction, the idea of his blood being a key element in a power - up scenario is quite common. Maybe his blood gets altered during a battle with a powerful ghost, and this new form of his blood gives him enhanced abilities like super speed or the ability to phase through any object without any effort. There could also be a fanfic where his blood is used by an evil ghost to create a clone of him, and Danny has to face this clone who has all his powers but a more malevolent nature.
One interesting Danny Phantom blood fanfiction could be about Danny's struggle with a new power related to blood that has unexpected side effects. For example, it might make him more vulnerable to certain ghostly attacks. Another could be a story where his blood has some sort of connection to an ancient ghostly prophecy.
There are fanfictions where Danny's blood has a special significance in the ghost zone. His blood might be the only thing that can heal a particular type of injured ghost. In one story, a young and innocent ghost is hurt, and Danny discovers that his blood has the power to save it. This leads to a whole new set of adventures as Danny tries to understand why his blood has this property and how it can be used for good in the ghost zone. At the same time, there are other ghosts who want to use this power for their own evil purposes, creating a conflict for Danny.
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.
One interesting idea could be exploring how the Blood Blossoms affect Danny's powers in unique ways. Maybe they don't just weaken him but also cause some strange glitches in his ghost form.
One interesting Danny and Dani fanfiction could be about them teaming up to fight a new and powerful ghost. They use their combined powers and unique abilities to outwit the enemy. For example, Dani might use her speed while Danny uses his more powerful ghost ray.
Another type of interesting fanfiction in the Danny Phantom universe might be those that delve into his relationships. It could be his friendship with Sam and Tucker taken to new levels. Maybe they go on an adventure together that tests their friendship in ways not seen in the original series. For instance, they might have to make a difficult choice between saving Danny's secret identity or saving the town from a new ghost threat.
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 storyline could be Paulina finally realizing Danny Phantom and Danny Fenton are the same person. She could initially be shocked but then come to accept it and they team up to fight a new powerful ghost. It would add a whole new dynamic to their relationship.
One idea could be exploring Danny's relationships in a different way. For example, how his friendship with Sam and Tucker might develop if they faced a new supernatural threat. Another could be a story where Danny discovers a new power and has to learn to control it while dealing with school and his ghost - fighting duties. And perhaps a fanfiction where Danny travels to an alternate dimension within the Danny Phantom universe.
One interesting danny phantom lemon fanfiction could be about Danny's new ghostly power discovery within the context of a unique adventure. Maybe he uses it to save his friends in a very unexpected way.
One interesting story could be about Danny's transformation in a unique and unexpected way. For example, he might transform into a different form that gives him new powers and challenges him to adapt. Maybe he turns into a form that is more animal - like and has to learn to control his new instincts while still fighting ghosts.
One interesting story could be about an FTM Danny Phantom dealing with his new identity while still having to fight ghosts. Maybe he uses his powers in unique ways that are related to his transgender experience, like using his transformation abilities as a metaphor for his own transition.