One plot idea could be that Edward and Eren discover they are brothers in a world where alchemy and Titans co - exist. They have to combine their skills, Edward's alchemy and Eren's Titan - shifting ability, to fight a common enemy that threatens both their worlds. Another idea is that they grow up together in a small village, unaware of their special powers at first. As they start to uncover their abilities, they face discrimination from the villagers but support each other through it all.
One plot idea could be that Jacob and Edward have to team up to protect their shared territory from a new threat. They start off distrusting each other but as they face challenges, they learn to respect and rely on one another.
One idea could be that Harry and Edward find themselves in a magical realm together where they have to solve a series of puzzles to save their world. They could use their unique skills, Harry's magic from his wizarding world and Edward's vampire abilities.
One idea could be exploring Eren's family life as a baby. Maybe showing how his parents interacted with him in a more detailed way, like his mother singing lullabies. Another could be a story where baby Eren has some sort of premonition about the future in his dreams, which is a very unique take on his character.
One plot idea could be that Alucard and Edward are forced to fight due to a misunderstanding. Maybe a powerful, mysterious force is manipulating events behind the scenes, making each think the other is a threat to their world. Another could be a battle for a powerful, ancient artifact that both believe they should possess for different reasons.
One plot idea could be that Jim discovers Edward's hidden talent for creating beautiful ice sculptures. He initially wants to use it for his own gain at a local fair but then realizes how much it means to Edward and they form an unlikely friendship.
Another plot could involve Edward making new friends in the town. These friends could be outcasts like him, and together they form a sort of club. They could then work on projects to beautify the outskirts of the town that have been neglected.
One common plot idea is exploring his past more in - depth, like his time at the military academy. It could show his relationships with other students and how he developed his skills and personality.
One idea could be exploring Edward Mordrake's backstory more in - depth. Maybe his life before the whole 'two - faced' situation, his family, and what led him to become the tragic figure he is. Another could be a modern - day encounter with someone who has a special ability to communicate with him.
One idea could be that Edward, as a cop, is assigned to protect a key witness. During this time, he discovers a complex web of secrets and has to fight against both the criminals who want to silence the witness and some corrupt colleagues. Another plot could be Edward investigating a series of mysterious murders in the city where all the evidence points to a supernatural force. He has to overcome his disbelief in the supernatural to solve the case. And also, Edward could be a rookie cop who gets involved in a big drug - bust operation and has to prove himself to his more experienced partners.
One idea could be that Harry and Edward meet in a magical forest that exists between the wizarding world and the vampire realm. They initially mistrust each other but then find out they have a common enemy and have to team up to defeat it.