A cool Doomguy crossover fanfiction could involve him crossing into the Dark Souls world. He'd be this indomitable force in a land of dark and difficult challenges. He could also cross over with the God of War universe. Doomguy and Kratos would make an interesting pair, both being extremely powerful warriors with a lot of anger. And how about a crossover with the Borderlands? Doomguy could run amok in the chaotic world of Pandora, fighting both demons and bandits.
Some great Doomguy crossover fanfiction concepts include a crossover with the Resident Evil world. Doomguy could bring his demon - slaying skills to Raccoon City or other infected areas. There could also be a crossover with the Devil May Cry series. He and Dante could have an epic battle or team - up against the hordes of demons. Additionally, a crossover with the Fallout universe would be interesting. Doomguy in a post - apocalyptic wasteland, fighting mutants and maybe even finding some ancient technology related to his own world.
A possible plot is that the female demon is a half - demon, half - something else (like an angel perhaps). Doomguy is intrigued by her dual nature. As they team up, she tries to resist her demonic instincts while Doomguy tries to trust her. Their relationship could be full of tension as they both struggle with their own natures and the outside forces that want to keep them apart.
Well, in female Doomguy fanfiction, often the character design is really cool. She can be depicted as having a more sleek and agile look compared to the bulky male Doomguy. This can affect how she moves through the levels and battles enemies. Also, the relationships she forms, whether it's with other survivors or even some reformed demons, add depth to the stories.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
Dante from Devil May Cry would be an excellent character to pair with Doomguy. Dante is a stylish demon hunter, and when combined with Doomguy's brute force approach, it would create some really cool action scenes. Also, Samus Aran from Metroid could be a good match. Samus' exploration skills and Doomguy's combat abilities could lead to an interesting story, especially if they are in a shared alien - infested environment.
A Rambo crossover fanfiction could involve him crossing over into the Star Wars universe. Rambo's guerilla warfare tactics could be interesting in a galaxy far, far away. Maybe he helps the Rebel Alliance in a ground - based battle against the Empire. Or a crossover with the Predator series. Rambo would be a worthy opponent for the Predator, and the fight between them in the jungle could be epic. Also, a Rambo and John Wick crossover would be intense, two highly skilled fighters on the same side or perhaps initially at odds.
One idea could be a crossover with a modern military setting. The Decepticons could be trying to steal advanced military technology. Another is a crossover with a post - apocalyptic world where they are competing with other factions for resources. A third could be a crossover with a magical realm, with the Decepticons trying to harness the magic for their own evil purposes.
One idea could be a crossover with Naruto. Kakuzu could be sent to the Naruto universe and form an unlikely alliance with a shinobi village to fight a common enemy, like the Akatsuki from his own world turned rogue in the new universe. This would create a lot of interesting character dynamics and battles.
Another option is a crossover with 'The Little Mermaid'. The characters from the descendants could meet Ariel and her friends underwater. Evie might be interested in the mermaid fashion and could design new outfits inspired by the underwater world.
Another possibility is a crossover with the world of Naruto. The characters from MHA could participate in the Chunin Exams. Bakugo might be really into showing off his skills in this new and different kind of competition.
One idea could be a Venom crossover with Spider - Man in an alternate universe where they have to team up against a common enemy like Carnage. Another could be a Venom and Deadpool crossover, with their crazy personalities clashing and then somehow working together. Maybe a Venom crossover with the X - Men, where Venom's alien nature causes some interesting reactions among the mutants.