Well, it could change the entire perception of Naruto's character. It might explore a darker side of the Naruto universe that we don't usually see in the original series. It could also attract a different kind of audience, those who are interested in seeing a more villainous take on Naruto.
The 'kami makes naruto evil fanfiction' might have some interesting psychological aspects to it. If Naruto is made evil, it would be a huge deviation from his usual kind - hearted and determined self. It could explore themes like corruption of innocence. Also, it could show how the Naruto world would react to having their hero turned into a villain. Would his friends try to save him? Or would they have to fight against him? There are so many possibilities that this kind of fanfiction could open up.
Chapter 242, "Jiang Yan's Dazzling Transformation Journey", is the clearest early answer because it pushes Jiang Yan into a new phase or setting. The chapter turns that into something concrete by moving from Just when Jiang Yan called to heaven and earth in vain, he looked up...
Chapter 333, "The Clothing Design Room", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. Early on, [LOL, the little brother turns out to be socially anxious too, he.... By the end, You've been cooped up in your room all week staring at this book;
Chapter 492, "Rewarding You with Some Wild Vegetables", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter turns that into something concrete by moving from Upon hearing the words, Jiang Cheng's face instantly turned pale.
Chapter 414, "The White Knife Goes In, The Red Knife Comes Out", is the clearest early answer because it turns Guan Xiong's situation into a concrete plot event. The chapter gives readers a real answer by opening on Third Master really lives up to his reputation; his skills are...
Chapter 627, "Definitely Not an Accident", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from He looked at the sinister smile lingering in Jiang Li's eyes, then at...
Chapter 391, "Has another top celebrity had a scandal?", is the clearest early answer because it turns Beijing Film Academy's situation into a concrete plot event. The chapter turns that into something concrete by moving from You were born in a rural area, not exactly poor, but not particularly...
Chapter 235, "Bungee Jumping in Ethiopia???", is the clearest early answer because it turns Yang Ren's situation into a concrete plot event. The chapter gives readers a real answer by opening on Chasing Wind Youth was clearly becoming anxious, and as a result, his...
Chapter 448, "Has Jiang Li Gone Crazy?!", is the clearest early answer because it turns World Encyclopedia's situation into a concrete plot event. The chapter gives readers a real answer by opening on Yu Li still wanted to persuade her, "Why not keep everything?
Chapter 381, "You are Liu Suqing's Daughter", is the clearest early answer because it turns Kejun's situation into a concrete plot event. The chapter gives readers a real answer by opening on Yu Tiantian was even more baffled now.