Some interesting concepts in Team Fortress 2 crossover fanfiction include crossovers with other FPS games. For instance, a crossover with Call of Duty. The different playstyles and weaponry from both games could create really exciting scenarios. The TF2 characters might be introduced to more modern military tactics. Another concept is a crossover with a game like Overwatch. The two groups of heroes could compete or team up. The Spy from TF2 could try to infiltrate the Overwatch team, or they could all work together to take down a powerful new threat. And a crossover with a game like Deus Ex, where the TF2 characters might get cybernetic enhancements and have to deal with a more technologically advanced world.
One interesting concept could be a crossover with other Valve games. For example, characters from Half - Life might find themselves in the Team Fortress 2 universe. They could interact with the TF2 characters in unique ways, like Gordon Freeman teaming up with the Heavy to fight off some common enemy. Another concept could be a crossover with a popular anime. Picture the TF2 characters in the world of Naruto, learning ninjutsu skills and having to deal with the shinobi politics. A third concept might be a crossover with a classic horror game. The TF2 mercenaries having to face off against the likes of Pyramid Head from Silent Hill in a spooky, fog - filled map.
Well, a cool concept in Team Fortress 2 crossover fanfic is the cultural exchange aspect. Imagine the TF2 characters in a setting inspired by a different culture, like a feudal Japanese - style world. The Heavy could be a samurai - like figure, and his minigun could be some sort of super - powered traditional weapon. Also, the idea of TF2 characters interacting with different species from other fictional universes is great. Maybe the Medic could be studying the biology of some alien creatures in a crossover.
One interesting concept could be a crossover with the world of Harry Potter. Team 7 could be transported to Hogwarts and have to navigate the magical world while still maintaining their ninja skills. Another idea is a crossover with the Avengers. Picture Naruto, Sasuke and Sakura fighting alongside Iron Man and Captain America against a common enemy. A third concept could be a crossover with the world of Pokemon. Team 7 could embark on a journey to catch different Pokemon and use their ninja abilities in Pokemon battles.
One plot could be that a powerful artifact has been discovered that has the potential to change the balance of power in both the Overwatch and Team Fortress 2 universes. Characters from both sides start to hunt for it. There could be double - crosses and alliances formed along the way. The Soldier: 76 from Overwatch might initially see the Red Team from Team Fortress 2 as enemies, but as they realize they have a common goal, they start to work together. Meanwhile, the Sniper from Team Fortress 2 could be in a sniping competition with Widowmaker from Overwatch as they also search for the artifact. This would create a mix of competition and cooperation in the story.
Some fanfictions create alternate universes. In one such AU, the team fortress 2 world could be a post - apocalyptic setting. The characters would have to adapt their skills and weapons to this new, harsher environment. It would be a really cool exploration of how their abilities and relationships change in this different scenario.
Some fanfictions might focus on the relationships within the team in more depth. Maybe exploring a time when Face and Hannibal had a major disagreement and how they overcame it. Or it could be about B.A. Baracus' softer side that we don't always see in the show.
One idea could be creating an OC (Original Character) who is a new recruit to one of the teams and has to prove themselves. Another is an OC that has a special ability that changes the dynamic of the battles. For example, an OC with the power to manipulate time for a short period during a fight.
One interesting crossover could be the characters from RWBY using the unique weapons and abilities of Team Fortress 2 characters. For example, Ruby could potentially use the Scout's speed to enhance her own combat style. Another aspect could be the settings. Imagine the RWBY characters in the TF2 maps, fighting against the TF2 villains or teaming up with the TF2 mercenaries. There could also be some fun interactions in terms of character personalities. Weiss might be exasperated by the more rowdy TF2 characters like the Soldier or Demoman, while Yang could find common ground with their bravado.
One interesting concept could be the clash of different mythologies. For example, if Nyarlathotep were to cross over with Norse mythology, the chaos he represents could disrupt the order of the Nine Worlds. Another concept might be the interaction between Nyarlathotep and modern-day characters. It could explore how an ordinary person would react to the presence of such a malevolent entity from Lovecraftian lore. Also, the idea of Nyarlathotep influencing different historical events in a crossover fanfiction can add a new layer of depth, like how he might have affected the fall of the Roman Empire in a fictional scenario.
One interesting concept could be the combination of different alien species from various sci - fi universes with the Space 1999 setting. For example, mixing the Goa'uld from Stargate with the Moonbase Alpha crew. It could create really unique power dynamics and storylines.
One interesting concept could be Momonga in a different game world, like being transported to a fantasy RPG world. He might use his unique skills from the original setting to survive and thrive there.