In some 'batman adopts jason fanfiction', a common plot is Jason facing threats from Batman's enemies who see him as a weak point or a new target. Batman then has to not only protect Jason but also teach him how to defend himself and use his skills effectively.
Well, perhaps there's a plot where Jason discovers a hidden side of Gotham while under Batman's wing. He could start to form his own ideas about justice that are both influenced by Batman yet unique. For example, he might focus more on helping the poor in a different way than Batman does. This could lead to some tension and growth between them as they navigate their relationship.
One interesting plot could be Batman teaching Wally about stealth and detective work. Batman's dark and methodical approach would contrast with Wally's more energetic and impulsive nature.
In a more emotional plot, Danny has lost his family in some ghost - related incident and is all alone. Batman, seeing a kindred spirit in Danny (both having experienced loss), decides to adopt him. Danny then has to adjust to living in the Batcave and being part of Batman's crime - fighting family. He struggles with fitting in at first but eventually finds his place and becomes an important asset to the team, using his powers in ways Batman hadn't thought of before.
In some 'Batman Adopts Harry Potter' fanfictions, a great plot is when Batman tries to enroll Harry in a normal school in Gotham. Harry has to adapt to a non - magical educational system while also hiding his wizarding past. At the same time, Batman is trying to protect Harry from any threats that might come from the wizarding world, like Death Eaters or Voldemort's followers who might want to harm the Boy Who Lived.
Obviously, Batman and Jason are the main characters. Batman is the mentor and adoptive father figure, while Jason is the young boy who is being taken under Batman's care.
One interesting plot could be Rosalie teaching Bella how to be more confident in herself. Since Rosalie is strong - willed, she might pass on some of that strength to Bella. Another plot could involve Rosalie protecting Bella from the other vampires who might not be so accepting of a human in their midst at first.
In some 'naruto adopts girl fanfiction', the girl might be an orphan from a war - torn area. Naruto, having known the pain of being alone as a child, takes her in. He helps her overcome her trauma by sharing his own experiences. For example, he could take her to Ichiraku Ramen and introduce her to his favorite food, creating a bond over simple pleasures. As she grows, she starts to show great potential in ninjutsu, which Naruto nurtures.
Maybe in the fanfiction, Kurenai adopts Naruto and helps him deal with his inner demons. She could use her understanding of the human psyche to guide Naruto through his traumas, like the loneliness he has felt since he was a child.
One interesting plot could be Severus having to deal with Harry's fame at Hogwarts while trying to keep their new family relationship a secret. It adds a layer of mystery and tension.
In some Coulson Adopts Avengers fanfiction, there could be a plot where Coulson helps the Avengers deal with their personal traumas. For example, he might use his father - like wisdom to guide Tony Stark through his self - doubt. Another plot could be Coulson training the younger Avengers like Peter Parker in combat and espionage skills, just like a mentor. And sometimes, there are plots where Coulson has to protect the Avengers from a new, powerful threat that the world doesn't even know about yet.
Another plot might involve Harry adopting Ginny to keep her safe from a powerful and secretive magical organization that has its eyes on her for some reason. Harry has to hide her identity and train her in advanced magic in order to keep her out of their reach. As they go through this process, their relationship evolves into a unique family - like bond filled with mutual respect and love.