There could be storylines that explore the psychological aspects of being a superhero in an adult - centric way. Such as how they cope with the pressure of always having to save the day and the toll it takes on their mental health. Also, perhaps a story about the Incredibles facing a new type of villain that challenges their beliefs and values in a more mature way.
One interesting storyline could be exploring the superheroes' post - retirement lives in more depth. Maybe Mr. Incredible dealing with the mundanity of normal life after years of adventure. Another could be about Elastigirl's challenges in balancing her family life and her superhero identity in new, more complex ways.
One interesting plotline could be the further exploration of the family's relationships. For example, how the kids deal with growing up with superpowers in a world that still has some prejudice against supers. Another could be the origin stories of the villains in more depth, like Syndrome. Maybe there could be a fanfic where he had a chance at redemption.
I'm not aware of specific popular 'Incredibles' adult fanfiction stories as I don't promote or focus on adult - themed content. However, there are likely many non - adult fanfiction stories about 'The Incredibles' that focus on things like the family's further adventures, new superpowers they might develop, or interactions with other characters in the superhero world.
Another possible storyline is the Jeffersons getting involved in a community project. They might have different ideas on how to run it, leading to some internal family debates. But through it all, they learn the importance of compromise and working together for the greater good of the community.
In some fanfiction, there could be a storyline about a love triangle among the Thundermans. For example, one Thunderman might be in love with a civilian, but another Thunderman also has feelings for the same person. This would create a lot of drama within the family as they try to sort out their feelings while still protecting their identities as superheroes.
Well, one could be an alternate universe where The Flash has to team up with unexpected heroes to save Central City from a new, powerful villain. Another might be a story where The Flash uses his speed in creative ways to solve complex mysteries in the city.
Perhaps a story where Mudbloods at Hogwarts start a secret club to support each other. They could share their experiences of dealing with the prejudice, study magic together in unique ways, and eventually gain recognition for their contributions to the school. This would show their strength and unity in the face of adversity.
One interesting storyline could be exploring the backstories of minor characters in more depth. For example, delving into the past of a Stormtrooper who has a change of heart. Another could be a different take on the relationship between Rey and Kylo Ren, perhaps a more platonic exploration of their connection based on their shared Force sensitivity. And a third could be creating a new adventure for Finn, Poe, and the rest of the Resistance that wasn't shown in the movie.
Another interesting concept for 'The Incredibles' fanfiction is to focus on the kids. For example, create a story where Dash discovers a new power that he has to learn to control while also dealing with school and family life.
In some Pretty Little Liars adult fanfiction, there could be a storyline where Hanna starts her own fashion business and faces challenges in the cut - throat fashion industry. The story could delve into how her friendships from high school help her through tough times, and also how her past with 'A' has made her more resilient. Additionally, it might show how the group of friends come together to support her in her new endeavor.
Another storyline could be that Cynthia discovers a lost Pokémon that has a special connection to Ash's past. They embark on a journey to learn more about this Pokémon and along the way, they face various challenges and form a deeper friendship. Ash's determination and Cynthia's expertise make them a great team in this story.