Well, in such a fanfiction, it might start with Naruto being in a situation where he becomes Madara's pet. Maybe at first, Naruto is defiant but as time passes, he could start to understand Madara's motives in some strange way. Madara, on the other hand, might initially see Naruto as just a possession but gradually develop a sense of attachment. It could be a really strange and complex relationship that unfolds as the story progresses.
Sasuke is often a popular character in these fanfictions. He might play a role in helping Naruto against Madara or have his own motives during their battle. Kakashi can also be a prominent figure, perhaps using his Sharingan in a crucial moment to assist Naruto. Another popular character could be Hashirama, as his connection to Madara is a key part of the original story and can be further explored in fanfiction.
In these types of fanfictions, the story could potentially focus on how the two characters deal with this unexpected situation. For example, Madara, being a powerful and complex character, might have different reactions compared to Naruto. It could also delve into the social and emotional implications within the Naruto universe if such a thing were to occur. There are likely to be many different interpretations depending on the author's vision.
In a Naruto fanfiction where he has Madara's attitude, he could become more power - hungry. Madara was always seeking power to reshape the world according to his ideals. Naruto might start to view the tailed beasts not as friends but as tools for greater power. He could try to gather more chakra and perhaps even attempt to unlock new forms of power that are more in line with Madara's dark and ambitious nature, which would shock his comrades and enemies alike.
Often, the resemblance could be in terms of the way Naruto stands or moves in these fanfictions. For example, Naruto might adopt a more menacing stance similar to Madara's. Also, his hair could be described in a way that it seems to mimic Madara's wild look, perhaps when he's in the middle of using a powerful jutsu.
In some fanfictions, it could be through a strange and powerful jutsu transfer. Maybe Madara, on the verge of defeat, decides to transfer his Rinnegan power to Naruto for some unforeseen reason, like seeing a new path for the ninja world in Naruto.
In this kind of fanfic, the author may describe Naruto's resemblance to Madara in terms of their auras. Naruto could have an aura that is as intimidating as Madara's. For example, when he enters a room, people might feel the same kind of pressure as they would when Madara was around. And perhaps Naruto starts to have some facial expressions that are similar to Madara's, like a certain smirk or a serious frown.
The 'forbidden love' trope also often plays a part. Since Madara was once an antagonist in the Naruto series, their relationship in the context of a mpreg fanfiction can be seen as a forbidden or unexpected one. This can add an extra layer of complexity to the story, as they navigate not only the pregnancy but also the social and moral implications of their relationship.
There could be. Fanfiction is a vast realm where many alternative storylines are explored. Since Naruto and Madara are both significant characters in the Naruto series, some writers may have thought it interesting to make Naruto Madara's grandson in their fictional stories. This can lead to completely different plot developments, new character interactions, and unique takes on the ninja world.
Yes, there could be fanfics with that plot. Fanfiction writers like to come up with all sorts of crazy ideas to reimagine the Naruto universe. But it's important to note that this goes completely against the official storyline. Naruto is from the Uzumaki clan and has his own origin story which has no connection to Madara in the original series.