Well, in a 'naruto is doomguy' fanfiction, Naruto would find himself in a completely different and much darker world than his own. He'd have to quickly learn how to handle Doomguy's arsenal of weapons. His natural athleticism and combat skills as a ninja would be put to the test in a new way against the demonic hordes. The story could also involve Naruto trying to find a way back to his own world while dealing with the constant threat of the demons. It could be a story of adaptation, survival, and heroism as Naruto tries to use his unique skills to fight in a world that's not his own.
There's a fanfic called 'Doomguy in the Hidden Leaf'. In this one, Doomguy gets transported to the Naruto universe. It's interesting to see how he interacts with the different ninja clans, especially when his no - nonsense attitude clashes with the more traditional ways of the Leaf Village. It's a short but engaging read.
Yes, there might be. Fanfiction writers often come up with the most unexpected crossovers. In a 'naruto is doomguy' fanfiction, one could imagine Naruto using his chakra in place of Doomguy's weaponry and his ninja speed and agility to take on the demons like Doomguy does. But it's also possible that it doesn't exist as it's a very specific and perhaps not so mainstream combination. You'd have to search through various fanfiction platforms to be sure.
It could be Doomguy. He has that no - nonsense, brute - force approach that often overpowers opponents.
A lot of the time, Doomguy's indomitable will and his combat experience in the face of demons can be paired with Naruto's ninja skills. Picture Doomguy charging into battle, and Naruto using his wind - style jutsu to enhance Doomguy's attacks, like making his melee strikes even more powerful with gusts of wind.
It would be really strange. Naruto is a hero - like character from a ninja - themed anime, while Sauron is a dark and evil entity from 'The Lord of the Rings'. In this fanfiction, Naruto might lose his positive values and become a power - hungry tyrant like Sauron. His signature jutsu could be transformed into dark magic. For example, his Rasengan could become a ball of dark energy.
A 'naruto is a goblin fanfiction' might start with some kind of magical transformation that turns Naruto into a goblin. As a goblin - Naruto, he could live in a different part of the Naruto world, perhaps in a forest or a hidden goblin - only area. His goal could be to find a way to turn back into his normal self while also facing challenges from other characters who might see him as a threat or an oddity. He might have to use his new goblin - like abilities, such as enhanced stealth or the ability to make simple goblin - made weapons, to survive and achieve his goal.
In a 'Naruto is the Venom' fanfiction, it could be that Naruto gets the Venom symbiote in some strange way. The story might explore how he deals with the new powers and the voice in his head that Venom often has. It could also show how his friends react to this new, darker - looking Naruto. And there could be new enemies that are drawn to the power of the symbiote. It would be a really interesting mix of the Naruto universe's ninjutsu and the alien - like nature of Venom.
In such a fanfiction, Naruto could be in a situation where he enters a dimension similar to the Undertale world where Gaster exists. He could learn about Gaster's experiments and try to use that knowledge to better his own village. For example, if Gaster had some unique way of manipulating energy, Naruto could attempt to adapt it to chakra manipulation. The story could also explore how Naruto's values from his own world interact with the often strange and complex ideas associated with Gaster.
A 'Naruto is a Firebender' fanfiction could be full of interesting twists. Naruto's personality would bring a unique flavor to firebending. He's impulsive and full of energy, which could translate into some really intense firebending. He could use his firebending to protect his village in new and unexpected ways. The story could also introduce new characters from the 'Avatar' universe who come to the Naruto world to teach him about firebending or to deal with the consequences of his new power. There could be a lot of political intrigue as well, as different ninja clans might react differently to Naruto's new ability.
Well, it could be really interesting. Naruto's ninja skills might be adapted to the Halo universe. For example, his shadow clone jutsu could be used in combat situations in Halo, confusing the Covenant enemies. His agility and speed could also give him an edge in the Halo battles.