Well, it could be a situation where Danny is facing a powerful enemy that he can't handle alone. Maybe this enemy has some sort of sonic - based powers, and since Black Canary is an expert in using her sonic scream, Danny thinks she can be of great help.
Black Canary's most famous skill is her sonic scream. This could be very useful in combat situations against Danny's enemies. For example, if they are facing a group of ghosts that are immune to Danny's normal attacks, her sonic scream might be able to disrupt their ectoplasmic forms.
One possible story could be that Danny is facing a new and extremely powerful ghost. He needs help from his friends Tucker and Sam. Maybe they need to find a rare artifact to defeat this ghost. They could start by researching in the local library, looking through old ghost lore books. Tucker uses his tech skills to try and track down any leads on the artifact's location, while Sam uses her knowledge of the occult.
He could be in a situation where he's trapped in the Ghost Zone. His friends might have to figure out a way to get to him. They could use some of Tucker's new inventions, like a Ghost Zone - traversing vehicle. They'd face many challenges along the way, such as avoiding other dangerous ghosts.
It could be one of his enemies. For example, Vlad Masters. He has always been envious of Danny and would love to see him in trouble. Exposing Danny's secret would be a great way for him to get back at Danny and take over Amity Park.
He might meet a nurse who has some sort of psychic ability and can sense that Danny is different. This could lead to an interesting interaction where Danny has to be extra careful.
It could be that Bill is involved in some sort of mystery regarding ancient magic. Hermione, being a brilliant witch who loves to study and research, can assist him in deciphering the clues and understanding the complex nature of the ancient magic that he has stumbled upon.
In fanfiction, the idea of Danny and Ember having a daughter can lead to really interesting storylines. Maybe their daughter could inherit Danny's ghost powers and Ember's musical abilities, creating a unique character. She could struggle with being half - ghost, half - something else due to Ember's unique nature, and have to find her place in both the human and ghost worlds.
In some fanfictions, Danny's mom might find out when she accidentally witnesses Danny transforming into his ghost form. Maybe she walks in on him at a crucial moment.
In this fanfiction, it could be that Danny Phantom meets a Danny Phantom from a parallel fan - made story. At first, they don't trust each other. But as they learn more about each other's worlds, they realize that there are some common elements that are being threatened. It could be that a powerful ghost is trying to rewrite all the fanfic universes related to Danny Phantom. So, they must combine their strengths and knowledge to stop this from happening.
Well, it could be that Danny is really into the Danny Phantom world and reading fanfiction about it is like a form of 'feeding' his love for the series. Maybe he finds new and exciting ideas in the fanfiction that he can't get from just the original show.