You could do a crossover with 'Castlevania'. The gothic horror elements of 'Castlevania' would blend well. Dracula could be a powerful killer, and the heroes from 'Castlevania' could be survivors. The survivors might have new abilities like using holy water or magic spells against the killers. It would also be interesting to see how the 'Dead by Daylight' maps would be transformed with the addition of 'Castlevania' - like architecture and elements.
One idea could be Naruto being a survivor with his unique ninja skills to outwit the killers. For example, he could use his shadow clone jutsu to confuse the killer and lead them astray. Another could be that some of the Naruto villains are the killers in the Dead by Daylight world, like Orochimaru with his snake - like abilities making him a terrifying and sneaky killer.
One idea could be a crossover where the Slenderman becomes a new killer in Dead by Daylight. He could use his teleportation and mind - controlling abilities to hunt down survivors. For example, he might make survivors hallucinate the location of generators or exits, leading them astray.
One plot idea could be that Dwight, being the leader - type in the survivors' group, tries to understand the Trapper's motives. Maybe he gets caught in a trap but instead of panicking, he tries to reason with the Trapper. The Trapper, initially hostile, starts to question his own actions due to Dwight's calmness.
Some fanfictions might center around the idea of the survivors finding a way to break free from the Entity's control once and for all. It could involve a lot of mystery and suspense as they discover secrets about the Entity's realm and use their combined skills and knowledge to try and escape. Maybe they find a powerful artifact within the realm that could be the key to their freedom.
One idea could be a crossover with the Alien franchise. Picture Isaac Clarke in a derelict Alien ship, facing both Necromorphs and Xenomorphs. The different types of terrifying creatures could create a really intense and unique horror scenario.
One idea could be a story where characters from 'Dead or Alive' cross over into a post - apocalyptic world. They could use their fighting skills to survive against new and dangerous enemies. Another idea is a crossover with a fantasy realm, and the 'Dead or Alive' characters have to adapt to magic and mythical creatures. For example, Kasumi might learn to use magic spells while still relying on her ninja skills.
A cool 'Walking Dead Crossover Fanfiction' idea is to cross it with 'The X - Files'. Mulder and Scully could be investigating the zombie outbreak. They might find out that it's not just a normal virus but some kind of government experiment gone wrong, which ties in with the conspiracy theories they usually deal with. And the characters from 'The Walking Dead' would be skeptical at first but then realize they need Mulder and Scully's help to figure out the real cause of the zombies.
One idea could be a crossover with Resident Evil. The main character from Dead Rising could find themselves in a Resident Evil - like scenario, dealing with different types of zombies and bioterror threats. They could team up with Resident Evil characters like Leon or Claire to fight against a common enemy.
One popular theme is the crossover of 'Dead by Daylight' with other horror franchises. For example, a fanfic might combine it with 'Silent Hill'. The spooky and desolate atmosphere of Silent Hill can blend well with the intense survival gameplay of 'Dead by Daylight'. Another theme could be crossovers with fantasy elements, like bringing in magical creatures or spells from other fantasy universes. This can add a new dimension to the existing horror - survival setting of the game.
A cool 'fear the walking dead crossover fanfiction' idea would be a crossover with 'Stranger Things'. The Upside Down could be connected to the zombie outbreak in some way. The kids from Hawkins could team up with the survivors of 'Fear the Walking Dead' to fight both the zombies and the strange creatures from the Upside Down. It would be interesting to see how their different skills and knowledge would work together.