A really odd idea could be a fusion of the Death Eaters and the Suicide Squad. They are both groups with their own dark agendas. The Death Eaters' magic combined with the Suicide Squad's chaos would make for a very interesting and unexpected story. It could be set in a world where the two universes collide.
An odd idea in these fanfics could be time - traveling between the two universes. For instance, Harry Potter traveling to the past in the DC universe to meet the early versions of the Justice League. Or a DC character like Flash coming to the Harry Potter world and using his super - speed to outrun magic spells. This creates a lot of opportunities for adventure and interaction between the two very different worlds.
In Harry Potter and DC fanfics, odd ideas can range from crossovers where Harry Potter characters end up in the DC universe and vice versa. For example, imagine Harry Potter using magic in Gotham City. Another odd idea could be a character from DC, like Batman, somehow getting access to Hogwarts and trying to figure out the magical world's rules. It adds a whole new layer of creativity and unexpectedness to the stories.
Maybe in the fanfic, the pimp cane is a symbol of a secret society within the Harry universe. It might be used to identify members or as a key to enter their exclusive lairs. This would be quite an odd and interesting concept.
One idea could be that Harry Potter somehow ends up in the DC universe and teams up with Batman. Maybe he uses his magic to help Batman solve a case that involves dark magic in Gotham. Another could be a story where the wizards of Hogwarts interact with the Justice League. For example, Superman could be intrigued by the concept of magic in the wizarding world.
One idea could be to create a fanfic where the Odd Squad agents have to solve a mystery in a parallel universe. Another idea is to write about how a new agent joins the Odd Squad and has to prove themselves. Maybe a fanfic about the Odd Squad facing an enemy they've never encountered before.
One idea could be that Harry Potter and his friends are transported to the DC Comics universe. They could team up with the Justice League to fight a common enemy like Voldemort who has somehow gained powers from a DC Comics villain. For example, Voldemort could have made a deal with Darkseid to gain more power in exchange for helping him conquer the wizarding world first. Then, Harry and the likes of Superman, Batman, and Wonder Woman would have to combine their magical and super powers to stop them.
One idea could be that Harry Potter and some of his friends are transported to the DC universe and they have to team up with superheroes to fight a common enemy. Along the way, they form a unique bond with the DC characters, creating a harem - like group where everyone has different skills and personalities that complement each other.
Some crossovers might involve the Dark Arts in Harry Potter and the villains in DC. Maybe Voldemort could team up with Lex Luthor. However, the heroes from both universes would have to join forces to stop this evil alliance. It would be a complex and exciting plot with a lot of twists and turns as the heroes from different backgrounds figure out how to work together against a common enemy.
One idea could be exploring what would happen if Harry had a twin sister who was sorted into Slytherin. It would add a whole new dynamic to the story, with her having different views and friends than Harry. She could be caught between loyalty to her house and loyalty to her brother.
Well, an insane Harry Potter fanfic might involve Harry being raised by the Malfoys instead of the Dursleys. This would completely change his personality and the way he views the wizarding world. Or it could be a fanfic where the magic in Hogwarts goes haywire and spells start to have opposite effects. For example, a levitation spell makes things sink instead. Also, a fanfic where Harry finds out he has a long - lost twin sister who has been hidden away by some dark magic.
One interesting idea could be a fanfic that focuses on the Marauders' time at Hogwarts. It could explore their pranks, friendships, and how they came to be the legends that we hear about in the original books. For example, showing how they created the Marauder's Map in more detail.