Well, a lot of fanfictions play around with the appearance of the Sage Cloak. They might make it look more elaborate or even give it new markings. This not only makes Naruto look more badass but also can symbolize new levels of power or a connection to different aspects of the Sage Mode. Some fanfictions also change how the cloak is summoned, like it could be summoned instantly without the need for Naruto to gather chakra in the traditional way.
In a Young Justice fanfiction, Naruto's Sage Mode could change the power dynamics significantly. His Sage Mode gives him access to nature energy, which could interact in strange ways with the various powers and technologies in the Young Justice world. For example, his ability to blend into nature while in Sage Mode might make him an excellent spy or infiltrator. Plus, his battle experience and strategic thinking from the Naruto world could help the Young Justice team in their missions.
A cool fanfic could center around Naruto teaching his friends about the unique abilities he gains from Sage Mode and Matatabi. For example, he could show how the Matatabi's chakra enhances his Sage Mode perception, allowing him to sense even the faintest of threats from a much greater distance. This could lead to new team strategies during battles against the Akatsuki.
Drawing Naruto Sage Mode's Manga Rasengan accurately can be challenging. You need to understand the energy flow, the shape, and the shading. But with practice and reference to the manga, you can get close.
The cloak could make Naruto more confident. If it has special powers, he would feel more capable and in control. For example, if it gives him the power of invisibility, he might start to take more risks in battles and become bolder in his strategies.
One interesting Naruto cloak fanfic could be one where the cloak has special powers bestowed upon it by an ancient sage. Maybe it can transform into different forms depending on Naruto's emotional state.
A fanfiction could revolve around Naruto being given an Akatsuki cloak as a gift from an unexpected source. Maybe a former Akatsuki member who has turned good. Naruto then has to decide what to do with it. He could modify it to represent his own ideals and use it as a symbol of unity between the Akatsuki remnants and the Hidden Leaf, working towards a more peaceful ninja world.
One idea could be to have a character from Naruto end up in the Cloak and Dagger universe. For example, Naruto himself could be transported there and his unique abilities like the Rasengan would be a shock to the characters in that world. He might team up with Cloak and Dagger to fight against a common enemy, perhaps a group that is trying to steal the powers of both universes.
Well, in fanfiction, one could enhance the design of the Nine Tails Cloak by making it more adaptable. It could change its shape according to the situation. For instance, if Naruto is sneaking around, it could flatten and become more streamlined. Also, the color could shift slightly depending on his mood. If he's calm, it could be a lighter orange, and if he's enraged, a deeper red. Additionally, it could have some sort of aura or glow that gets stronger as he uses more of its power.