Another idea is a crossover with 'Star Wars'. The Ghosts could be transported to a galaxy far, far away. They might have to use their military training to survive in a universe filled with lightsabers, the Force, and various alien species. They could form alliances with the Rebel Alliance or get caught up in the conflict between the Sith and the Jedi.
One idea could be a crossover with the 'Halo' universe. The soldiers from 'Call of Duty Ghosts' could team up with Spartans to fight a common alien threat. They could share their combat strategies and learn from each other's advanced technology.
One plot idea could be Logan and Keegan getting separated during a mission in a war - torn city. Logan has to fight his way through enemy lines to find Keegan who is trapped and injured. Another could be a prequel - style story where they first meet during their training days and start to form their unbreakable bond.
A cool plot could involve a crossover with the 'Alien' franchise. The soldiers in Call of Duty Advanced Warfare could be sent to a distant planet where they encounter the deadly Xenomorphs. They would have to use their advanced military skills and weaponry to survive against these terrifying creatures. It could also be interesting if there was a crossover with a post - apocalyptic game like 'Fallout'. The Advanced Warfare characters could end up in the wastelands of 'Fallout', trying to adapt to the new environment and find a way back to their own world while dealing with the various threats in the Fallout universe.
One idea could be a crossover with a science - fiction movie like 'Blade Runner'. The Black Ops 3 characters could find themselves in the dystopian future of 'Blade Runner', having to deal with the replicants while also trying to figure out how to get back to their own world. Another plot could involve a crossover with a superhero universe. Maybe the soldiers in Black Ops 3 gain superpowers and have to use them to fight against an even greater threat that combines the high - tech warfare of their world with super - villainy.
One idea could be creating an OC (Original Character) who is a sniper with a troubled past. Maybe they were once a part of a special forces unit but got betrayed. Another idea is an OC that is a female medic in a male - dominated warzone, facing discrimination and proving herself. A third idea could be an OC that discovers a hidden conspiracy within the military hierarchy of the Call of Duty universe.
One idea could be to have the soldiers from Call of Duty end up in the RWBY universe. They could be shocked by the Grimm and then team up with the RWBY characters to fight against them. Another idea is a crossover where RWBY characters use Call of Duty - style weapons. For example, Ruby could use a high - tech sniper rifle like in Call of Duty.
Well, you could focus on the relationships between the characters. In fanfiction, you can develop friendships or romances that were only hinted at in the game. For instance, write about how two soldiers from different squads form a strong bond during a difficult mission. Or, you could introduce new characters into the existing story. A new alien species that has different motives and abilities than the ones in the game could add a whole new layer of complexity to the fanfiction.
A great plot for Call of Duty Zombies fanfiction could be centered around a group of misfits. They find an ancient artifact that seems to have power over the zombies. As they try to figure out how to use it, they face not only the zombies but also other groups who want the artifact for their own evil purposes. This could involve a lot of action - packed scenes, character development as they learn to trust each other, and exploration of the game's lore. For example, they might discover that the artifact has a connection to an old military experiment that went wrong and led to the zombie outbreak.
One plot idea could be that Keegan and Logan are on a mission behind enemy lines. They get separated from the rest of their team and have to rely on each other to survive. They face various challenges like harsh terrains and enemy ambushes. As they struggle to make their way back, their bond deepens.
Master Chief from 'Halo' would be an excellent choice. His superhuman abilities and combat experience would add a new dimension to the 'Call of Duty Ghosts' story. He could lead the Ghosts in a crucial battle or teach them some of his unique combat techniques.
One interesting concept could be the combination of different characters from the Call of Duty universe and other related universes in the fanfiction. For example, seeing how a character from a different Call of Duty mode would interact with the Nazi Zombies scenario. Another concept might be the introduction of new and unique weapons that are a blend of the two crossover elements. It could also be about how the storylines from both aspects are intertwined, like a plot that involves the main Call of Duty campaign's events somehow influencing the Nazi Zombies' situation and vice versa.