What are some interesting concepts in left 4 dead crossover fanfiction?

One interesting concept could be the merging of different character personalities. For example, if a character from 'Left Behind' is crossed over with a character from another series, their contrasting beliefs and values can create engaging storylines. Maybe a character who is very religious in 'Left Behind' meets a more skeptical character from another story, leading to debates and growth for both.

One interesting concept could be the combination of the Flood from Halo and the Necromorphs from Dead Space. Imagine how the two different types of parasitic, body - transforming threats would interact. Another concept might be the technology exchange. For example, how would the UNSC weapons and armor function in the Dead Space universe, and vice versa with the Dead Space engineering and weaponry in the Halo universe.

One idea could be a crossover with a post - apocalyptic zombie series. The characters from Left for Dead could find themselves in a different zombie - infested world and have to adapt to new threats and survivors. For example, they might encounter a group that has a very different approach to survival, like a religious cult that believes the zombies are a form of divine punishment. This could lead to conflicts and alliances as the Left for Dead characters try to find their way back to their own world.

One interesting concept could be the merging of Dead Space's terrifying necromorphs with the characters or settings from another universe. For example, if there was a crossover with a science - fiction series like Star Trek, seeing how the Starfleet crew would handle the necromorph threat would be really cool. They have different technologies and ethics, so it would create a lot of conflict and new storylines.

Perhaps Voldemort somehow manages to bring the Left 4 Dead zombies into the wizarding world. The Order of the Phoenix and the Death Eaters are forced to team up to survive. The Death Eaters' dark magic might be used in new and unexpected ways against the zombies, and the Order's more defensive and protective spells would also be crucial. Harry, being the hero, could figure out a way to stop Voldemort from bringing in more zombies and find a way to send the existing ones back.

One interesting concept could be alternative storylines for the characters. For example, a fanfiction might explore what would happen if a particular character didn't get infected in the first place. It could change the whole dynamic of the game's story. Another concept could be crossovers with other similar apocalyptic universes, bringing in new threats and challenges.

One interesting concept could be how the other characters in the original story cope with Ash's death. They might have to step up and fill the void he left.

Zombies are a common element. Since Left 4 Dead 2 is all about fighting zombies, in crossovers, the zombies often play a central role. They might be different in some ways, like having new abilities if it's a crossover with a more supernatural - themed universe.

One interesting concept could be the exploration of gender in a different way than in the original work. Fanfiction might delve deeper into how the unique gender system affects relationships and society.

Another concept could be the exploration of the planet's environment in new ways. Fanfiction might describe uncharted regions of the planet in the Left Hand of Darkness universe, or how the extreme cold affects not just the physical but also the mental state of the characters. Maybe a story could be about a character's journey through a particularly harsh and unknown part of the planet.