Another possibility is that a spell from the Harry Potter universe affects the androids in Detroit. Maybe a spell makes them gain real emotions and magic abilities. Kara could use her newfound magic to protect Alice in a more extraordinary way, like creating magical shields against anti - android forces.
Perhaps a group of wizards from the Harry Potter world visit Detroit in the future where androids exist. They are fascinated by the technology and try to find a way to combine magic and android capabilities. Harry Potter characters like Hermione could start studying the androids' programming while also teaching them some basic magic spells.
One idea could be that some of the androids from Detroit: Become Human find their way into the Avengers' universe. Maybe they are mistaken for new types of advanced technology or even potential threats. For example, Connor could team up with Iron Man. Connor's detective skills and Iron Man's technological genius could make for an interesting combination as they try to solve a mystery that involves both their worlds, like a new form of energy that is causing chaos.
You could focus on the relationship between Connor and Hank in a fanfiction. Imagine if Connor had a different origin, like he was created by a group of rogue scientists who wanted him to be more human - like from the start. This could lead to a whole new dynamic between him and Hank, as they would have different interactions and goals. Also, you could write about how the androids develop new emotions and abilities that were not shown in the original game.
The Gryffindor trio - Harry, Ron, and Hermione - might be quite shocked at first when they meet the androids. They could initially be distrustful, especially Harry who has faced many dangerous things. But then they might see the good in the androids, like how Kara is so determined to protect Alice. They could help the androids by using magic to hide them from anti - android forces if they were in the Detroit: Become Human world.
One idea could be that Fluttershy somehow gets transported into the Harry Potter world. Maybe she arrives at Hogwarts as a new kind of magical creature that the students have never seen before. Her gentle nature might initially cause confusion among the more rowdy students, but she could gradually make friends with the likes of Luna Lovegood, who would be intrigued by her uniqueness.
Another concept could be that Harry Potter discovers he has a connection to Magneto's mutant powers. This might happen during a strange encounter with a dark magic object that unlocks a latent power within him. He then has to learn how to control these new abilities while also dealing with the threats in his own wizarding world, and he might seek out Magneto for guidance in a secret meeting across the boundaries of their two worlds.
One idea could be a crossover where Kakashi is summoned to the Harry Potter world by a dark magic spell gone wrong. He then uses his ninja skills and Sharingan to navigate the wizarding world, perhaps even teaching some Defense Against the Dark Arts classes with his unique combat knowledge.
Maybe in a fanfiction, Harry Potter and his friends accidentally stumble upon a hidden Cybertronian relic. This relic has some sort of power that attracts Megatron. Harry and his friends then have to defend the relic from Megatron while also trying to figure out what it does and how to use it to their advantage in the fight against Voldemort.
One idea could be a crossover where Harry Potter accidentally travels to the One Piece world and meets Whitebeard. He could learn about their different forms of magic and power, and together they face a new threat that combines the dark magic from his world and the powerful pirates in the One Piece world.
One idea could be a crossover where Harry Potter accidentally ends up in the world of Ranma 1/2. Maybe he's on a magical experiment gone wrong and lands in Nerima. He could use his magic to help Ranma deal with his curse, like creating a spell to keep him from changing into a girl when splashed with cold water.
Another concept could be a crossover where the magic in the Harry Potter universe has an unexpected effect on Android 18. For example, it could start to interact with her android systems in strange ways, giving her new powers or abilities that are a combination of magic and her android technology. This would lead to a whole new set of adventures as she tries to figure out what's happening to her.