A great plot point would be if they have to work together to reverse some sort of ghost - related disaster that Jack's inventions accidentally caused. Danny's powers and Jack's knowledge of technology could be the key to fixing it. And along the way, they grow closer as they overcome obstacles.
In the fanfiction, they could team up. Jack has all his ghost - hunting gadgets and Danny has his ghost powers. They could use their combined skills to fight a common enemy, perhaps a more powerful ghost that neither could handle alone. It could be a start of a new alliance between them.
In many Danny Phantom singing fanfictions, there's a plot point where Danny's singing is somehow connected to his family heritage. Maybe his ancestors were also great singers or had a connection to music in the ghost world. This connection adds depth to his character and his relationship with his family. Also, when Danny's singing is used to break a curse in the Ghost Zone, it creates a very exciting and unique storyline.
Another aspect could be the interactions between Danny and his friends while he's sick. His friends might be worried and try to take care of him in their own unique ways. For example, Tucker could bring over some high - tech gadgets to monitor Danny's condition, and Sam could make sure he's eating healthy. Also, the ghosts might take advantage of Danny being sick and weak to cause more trouble in Amity Park.
A common interesting plot point is the culture shock. Danny, coming from a world where ghosts are more of a local, small - town kind of threat, suddenly being in a world full of magic like Harry Potter's. He has to learn about things like Quidditch and the different houses in Hogwarts. It's like a fish out of water story, but with a supernatural twist.
One interesting plot point could be Danny's struggle to find a new power or technique to defeat Pariah Dark. Maybe he discovers an ancient artifact that gives him an edge. Another could be the exploration of Pariah Dark's backstory, like how he became so powerful and evil in the first place.
One possible plot is that Jack Frost accidentally enters the world of Danny Phantom. Danny at first is suspicious of him but then realizes they have a lot in common. They start exploring each other's powers and end up having to stop a powerful entity from stealing their powers. It could involve a lot of action scenes where they learn to work together and use their unique skills to their advantage. For example, Danny could use his intangibility to dodge attacks while Jack freezes their opponents. There could also be some comical moments as they get used to each other's different personalities and ways of doing things.
One possible plot could be that Danny Phantom, through some magical mishap or powerful spell, is transported to the world where Jack Frost exists. Danny has to figure out how to get back home while also dealing with the new powers and rules of Jack Frost's world. He might start out as an outsider but gradually gain the respect of the other winter spirits as he uses his ghost - fighting skills in a new way.
In 'Danny Phantom Son of Nightwing' fanfiction, a significant plot point is the integration of the two universes. Danny's discovery of his parentage as Nightwing's son is just the beginning. After that, he may face challenges in training to use new skills or powers. There could be a plotline where he tries to bring the two groups of heroes (from Danny Phantom and Nightwing's world) together to fight a common enemy. Additionally, his personal growth as he navigates between these two identities and tries to find his place in both worlds is a central aspect of the story. The way the fanfiction portrays his internal conflict and external battles makes for an engaging read.
In many fanfictions, a plot point could be the exploration of the differences in their power sources. Superman's powers come from the sun, while Danny's are related to the Ghost Zone. This can lead to interesting scenarios where they either learn from each other or try to use the other's power source against them. Another common plot point is the reaction of the people around them. How do the citizens, Lois Lane, or Danny's friends react to this encounter between the two powerful beings?
A common interesting plot point is the adaptation of Danny's powers to the SAO world. His ability to go intangible and invisible can create some really unique combat and stealth situations. For instance, he could easily pass through some of the in - game barriers that normal players can't.