Another interesting plot could be that Naruto somehow gets transported to Danny's world and has to learn to use his powers in a different environment. He could teach Danny some of his ninja skills in return for learning about controlling ectoplasmic energy.
One idea could be a crossover where Naruto and Danny Phantom team up to fight a powerful common enemy that threatens both their worlds. Maybe a villain who can manipulate both chakra and ectoplasm.
One interesting 'godlike danny phantom fanfiction' could be where Danny uses his new god - like powers to explore different dimensions. He might encounter versions of himself with different abilities and personalities. Another could be about Danny having to face an ancient evil that only his godlike powers can defeat. He has to learn to control these extreme powers quickly in order to save the world.
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 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.
A great fanfiction idea could be a time - travel story within the Danny Phantom Phantom Planet universe. Danny somehow gets sent back in time to before he became a half - ghost. He has to figure out how to get back to his own time while also dealing with the knowledge he has of the future. This could lead to some really interesting interactions with his past self, his family, and friends. And he might accidentally change things in the past that could have a huge impact on the future of the Phantom Planet.
Well, there could be a story where Danny's ghost sense starts acting up in the Naruto world. It turns out that there are some spirits there that are similar to the ghosts in his world. Naruto thinks Danny is crazy at first but then they discover that these spirits are tied to an ancient curse. Together, they have to find a way to break the curse. Danny uses his ability to communicate with ghosts to learn more about the spirits, and Naruto uses his determination and strength to face any physical challenges that come their way.
One idea could be Danny Fenton having to deal with a new ghostly enemy that can manipulate time, making his double life as Danny Phantom even more chaotic. Another could be Danny trying to balance his high school life, including exams and relationships, while also facing a ghost invasion that only he as Danny Phantom can stop. Or perhaps a story where Danny Phantom discovers a hidden power within himself that has a connection to his human side, Danny Fenton.
One idea could be that Danny discovers a new ghostly power that he uses to take revenge on a group of bullies who have been tormenting his friends. He could use his intangibility in a creative way, like sneaking into their lockers and making their things disappear.
One idea could be exploring Danny's new role as a hero on a global scale. Maybe he has to deal with new threats that are attracted to his increased fame. Another could be delving into his relationships with his friends and family after the big events in Phantom Planet. For example, how does his relationship with Sam and Tucker change now that he's a more public hero?
You could write a fanfiction where Danny Phantom discovers an ancient ghostly artifact that is actually a highly advanced piece of technology from an extinct ghost civilization. He has to figure out how to use it, and in the process, he learns a lot about the history of the ghost zone and how his powers might be related to this long - lost technology. This could lead to some really cool adventures as he tries to keep the artifact out of the wrong hands.
One idea could be a crossover where Danny Phantom and Ultraman team up to fight a common enemy from another dimension. They could combine their powers in unique ways, like Danny using his intangibility and Ultraman his beams.