Another theme is the exploration of different game mechanics. Writers often play with the idea of how the TF2's class - based system and Overwatch's hero - based system could coexist or clash in a fanfic story. It can lead to really interesting scenarios and battles. And also, the theme of teamwork or lack thereof between the two groups is often explored. Since both games have elements of teamwork, seeing how the characters from different games work together or against each other is quite fascinating in fanfics.
A frequent theme is the struggle for acceptance. Since the OC is new, they sometimes have to prove themselves to the established Overwatch members. Also, heroism is a big theme. The OC usually tries to do heroic deeds, whether it's saving a city from a new threat or helping out in a humanitarian crisis within the Overwatch world. Additionally, there can be themes of redemption, especially if the OC has a past they are not proud of.
Teamwork is another big theme. Both Naruto and Overwatch emphasize the importance of working together. Fanfics will show how characters from both universes come together to form teams. They might have to overcome differences in fighting styles and ideologies to achieve a common goal, like protecting a city or defeating a powerful enemy.
Another possibility is that there's a rift in time or space that brings the two universes together. The TF2 and Overwatch characters find themselves in a strange new world that's a mix of both of their own. They have to figure out how to get back to their respective universes while also dealing with local threats. Some characters might be tempted by the different cultures and powers they encounter, which could cause internal conflicts within the combined group.
A major theme is the exploration of new powers. When Pokemon transform, they may gain new powers that they need to understand and control. Also, friendship is a common theme. The transformed Pokemon still rely on their friends, and these relationships are often explored in the fanfic.
One interesting crossover could be the combination of TF2's unique character classes with Overwatch's diverse heroes. For example, the Scout from TF2 could have a race against Tracer from Overwatch. Another could be the Medic from TF2 teaming up with Mercy from Overwatch to heal a group of both TF2 and Overwatch characters in a chaotic battle scenario. Also, the Engineer from TF2 might build structures in an Overwatch - like map to help both teams' forces.
Another theme is the idea of heroism. Both Overwatch and Spiderman are about heroes, and in these fanfics, they usually combine their heroics. For example, they might fight a common enemy that neither could defeat alone. It shows that different types of heroes can work together for the greater good.
Technology and humanity is also a big theme. Since it's about cyborgs, there's always a question of how much of the original humanity remains and how the technology affects the being. For example, in many fanfics, the cyborg has to learn to balance its mechanical and human sides.
One common theme could be self - discovery. The transformation into a clown and the relation to tg elements might be used as a metaphor for the character's journey of finding their true self.
One common theme is the struggle with identity. When a character transforms into a dragon, they have to come to terms with their new self. For example, they might have to deal with new instincts like a desire for hoarding or a different way of seeing the world.
One common theme is the redemption arc. Given Reaper's rather dark and brooding nature, many fanfics explore the idea of Mercy helping him find redemption. For example, she might try to heal not just his physical wounds but also his damaged soul.