Maybe the mermaid is cursed and the only way to break the curse is to be part of a successful Glee club. So she has to learn all about human music and performance. Her mermaid - like charm and beauty could attract new members to the club, but she also has to deal with the jealousy and insecurities of some of the existing members. This would add a lot of drama to the fanfiction.
The Little Mermaid's belly could be the key to a mystery. For example, there could be an ancient riddle in the ocean that says only a mermaid with a special mark on her belly can unlock a certain power. The Little Mermaid discovers she has this mark. So she embarks on a journey to figure out what this power is and how to use it to benefit the ocean and her fellow sea creatures. It could involve her meeting other mermaids or sea wizards who can help her understand the mystery.
Imagine a region in the Pokemon world where there is a festival related to diapering Pokemon. Trainers from all over come to show off their best - decorated Pokemon diapers or compete in diaper - changing races. This would be a really creative and fun way to incorporate the concept. It could also be a way for different trainers to bond and share their experiences with taking care of their Pokemon in this aspect. Also, there could be special rewards for the winners, like rare Pokemon items or new types of Pokemon diapers that have unique abilities.
In 'glee born this way fanfiction', the plot could revolve around the creation of a performance in the Glee club that is centered around the 'born this way' song. This could lead to different character arcs, like some characters having conflicts about how to best represent the message, while others are fully on board from the start.
There could be a plot where the mermaid's existence in the Glee universe is a secret known only to a few members of the club. These members have to protect her identity while also helping her pursue her dreams in the club. For example, they might help her find a way to perform without revealing her tail, or they could help her understand human music better so she can contribute more to the club.
Another concept for the fanfiction could be that the female Nightfurry is from a different dimension. She accidentally ends up in Toothless' world. Toothless helps her adjust to this new place, and in the process, they discover new things about their own powers and abilities. Their story could be about exploration, not just of the physical world but also of their own inner selves.
It could also be a character - based integration. A new character inspired by Dark Naruto could be introduced into the RWBY fanfiction. This character might have similar traits such as a thirst for power and a bit of an anti - hero complex. They could interact with the existing RWBY characters, causing conflict and also growth among them.
Well, in a Young Justice fanfiction, the concept of Naruto being immortal could be integrated in various ways. One way could be through some sort of magical or scientific experiment gone wrong that gives him immortality. Maybe it's a meta - human experiment in the Young Justice universe that accidentally gives Naruto the same powers as Vandal Savage, including immortality. Another possibility is that it could be a result of a powerful jutsu he uses that has unforeseen consequences and makes him immortal.
One possible storyline could be a character in Glee who is struggling with their sexual orientation. The 'born this way' theme helps them gain the courage to come out to their friends and family, and the Glee club becomes a support system for them.
Maybe in the fanfiction, the Little Mermaid characters visit Pandora. Ariel could be fascinated by the bioluminescent plants and animals. She might try to communicate with the Pandora's creatures using her own unique way of communication. The Na'vi, on the other hand, would be intrigued by her mermaid form and her ability to swim so freely in the water. This could lead to an exchange of cultures and knowledge.
In a fanfiction, they could be pen pals. Little Mermaid writes about her underwater adventures to Jasmine, and Jasmine writes back about the happenings in her palace. Through their letters, they come to understand each other's worlds better. When they finally meet in person, it's like meeting an old friend. They then decide to have an exchange program of sorts, where some of Jasmine's people visit the underwater kingdom and vice versa to promote cultural exchange.