Another idea is that she changes her look as part of a self - discovery journey. She might decide to cut her hair short and start wearing more modern - looking wizarding robes, which causes a stir among her friends. Some of them are initially shocked, but as they see her new confidence, they come to accept and admire her new look.
Hermione's new look could make Harry more protective. For example, if she changes to look more alluring, he might worry that she'll attract unwanted attention from the wrong sort of wizards. This could strengthen their bond as he looks out for her more than before.
Another plot could be Hermione changing her identity because she is wrongly accused of a crime. She decides to assume a new identity to clear her name. In this new identity, she travels to different magical communities, looking for evidence that can prove her innocence. Along the way, she meets new characters and has various adventures.
Perhaps a storyline where Hermione is a mother in a post - war wizarding world. She has to raise her children in a society that is still rebuilding, teaching them values of peace and unity. This could involve her sharing her own experiences from the war to instill important life lessons.
One interesting storyline could be Hermione finding herself in Gotham City and having to use her magical skills to outwit the Joker. Maybe she tries to stop his evil plans without revealing her magic to the non - magical inhabitants of Gotham. Another could be the Joker getting his hands on some magical item from Hermione's world and she has to retrieve it. For example, if he got a powerful wand, Hermione would need to use her intelligence and magic to get it back before he causes chaos with it.
One interesting storyline could be where Deadpool somehow gets transported to the wizarding world. He'd be his usual chaotic self, confusing the hell out of everyone, especially Hermione. She might initially be put off by his insanity but gradually see his good side as he helps in some sort of magical - mutant mash - up adventure, like fighting a new dark wizard - mutant hybrid villain.
Another storyline might involve Ginny and Hermione teaming up to solve a mystery within Hogwarts. Maybe there are strange disappearances of students and they use their combined skills, Ginny's Quidditch - related quick thinking and Hermione's vast knowledge, to get to the bottom of it. They might suspect a hidden chamber or a rogue spellcaster. They start by interviewing students and staff, gathering clues from different parts of the castle, and finally unmask the culprit.
One possible storyline could be that in a hidden corner of Hogwarts, Snape discovers Hermione's secret project related to advanced potions. This could lead to a begrudging respect as he sees her intelligence and determination, similar to how he respected Lily. Another could be Hermione stumbling upon Snape in a corner where he is reminiscing about his past, and she gains a new understanding of his character.
One interesting storyline could be Hermione getting involved with the Black family secrets. Maybe she discovers a hidden Black family magic that could change the wizarding world. For example, she might find a spell that has been lost for centuries within the Black family library.
Another storyline might involve a time - travel scenario where Hermione goes back in time and encounters a younger Fenrir Greyback. She attempts to change his path, to prevent him from becoming the cruel werewolf he is known to be in the future. This could involve her using her knowledge and magic to offer him a different future, but facing many challenges along the way.
One interesting storyline could be their children starting at Hogwarts and facing new, unforeseen magical challenges that Harry and Hermione have to guide them through. Maybe a new dark wizard is on the rise and their kids are the ones who first notice the signs.