In this fanfiction, it could be that the Red Dragon Emperor's abilities are mistaken for a new and dangerous form of jutsu. This misunderstanding might lead to Naruto being hunted by certain groups within the ninja world who fear this unknown power. Meanwhile, Naruto has to figure out how to use this power to protect his friends and village, and also how to clear the misunderstandings.
One idea could be the Black Dragon Emperor's powers influencing Naruto's ninjutsu in unique ways. For example, his fire - based jutsus might gain a more dragon - like quality, like the flames taking on a blackish hue and having a more destructive force.
Perhaps a plot point is the interaction between the Naruto characters and the entities related to the Red and White Dragon Emperor. For example, how Naruto or his friends react to the sudden appearance of a character with such unique powers. It could lead to some really cool team - up scenarios or even rivalries as they try to understand and work with or against this new element in their world.
In this fanfiction, a really cool plot could be that the red dragon is actually a reincarnation of an ancient hero. It has the memories of the hero locked deep within its mind. As the story progresses, certain events trigger these memories to resurface. The dragon then has to come to terms with its new - old identity and use the hero's skills and knowledge to save its world from a looming disaster like a cataclysmic magical storm or an invasion from a parallel dimension.
One idea could be that Naruto, as a dragon, has to protect the Hidden Leaf Village from a new threat that is specifically targeting dragons. He could use his dragon abilities like flight and powerful breath attacks to fend off enemies.
Another plot idea is a story where the Red Dragon has to face a new and powerful enemy alone, without Yona and the other dragons by his side. It could show his individual strength and his ability to strategize in difficult situations.
Perhaps a plot where the Crimson Dragon God Emperor has to form an unlikely alliance. For example, teaming up with a group of rebels who initially oppose him but then realize they need to work together to face a greater threat like a cosmic catastrophe that could destroy their world. This would involve a lot of character development and conflict resolution as they learn to trust each other.
One interesting plot idea could be Izuku discovers new and powerful forms of the White Dragon Emperor's power that no one has seen before. This could lead to him being able to defeat powerful villains with ease and surprise everyone.
Maybe the OC White Dragon Emperor gets involved in a multi - realm tournament. He has to battle against various powerful beings from different dimensions. This would not only show his combat skills but also how he strategizes against different types of opponents.
One idea could be exploring the backstory of the Dragon Emperor before he was mummified in more detail. Maybe there were secret loves or betrayals that led to his downfall.
One interesting plot could be a character with the red rinnegan having the power to manipulate time on a small scale. For example, they can rewind a few seconds during a battle to avoid an attack or foresee an enemy's move. Another idea is that the red rinnegan gives the ability to communicate with ancient spirits of the Naruto world, which could lead to uncovering long - lost secrets about the origin of chakra.