Perhaps in a fanfiction set in an alternate universe, Naruto is born with a different set of circumstances. In this universe, the genetics work in a way that he looks exactly like Minato from the start. This could change his relationships with people like Jiraiya, who might see him as a younger version of Minato and treat him differently, which would then shape Naruto's character development in a new way.
One possible scenario is when Naruto travels back in time in the fanfiction. He might end up looking like Minato as a result of some time - traveling magic or jutsu side - effect. This could lead to all kinds of interesting situations, like his friends not recognizing him at first.
In a fanfiction where there is some sort of genetic experiment gone wrong or right, Naruto could end up looking like Minato. Maybe an enemy was trying to manipulate Naruto's genes but instead made him look more like his father. This could then be a source of confusion for Naruto and those around him as they try to figure out what happened.
Chapter 592, "The Secret of Dragon Ridge Lake", is the clearest early answer because the hidden truth stops feeling like mere subtext. The setup is Hmm?" Jiang Li's unexpected question left Zhao Lang somewhat..., but the pressure keeps building through There must be something wrong with the lake..
Chapter 646, "This person deserves a slap in the face!", is the clearest early answer because it turns Gu Yu's situation into a concrete plot event.
Chapter 531, "She Really is a Remarkable Person", is the clearest early answer because it turns Zhou Xu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Zhou Xu also brought over a plate of sunflower seeds and was just...
Chapter 705, "Is She Her Own Destined Noble Person?!", is the clearest early answer because it turns Yu Fei's situation into a concrete plot event. The chapter turns that into something concrete by moving from He Wen was made to laugh by Bai Lu.
Chapter 922, "The Good Deed You Did!", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li skipped through those comments and called Zhao Lang back.
Chapter 508, "Isn't this the wild boar raised by Jiang Li?!", is the clearest early answer because it turns Isn's situation into a concrete plot event. It opens with A chill wind suddenly arose, and the team members of Team D hiding in...
Chapter 586, "She Just Likes Men Who Show Weakness Initiative", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. It opens with Jiang Yan quickly swam over to the person. and closes on Then, the egg moved, and after lifting itself up, it sprouted two....
Chapter 677, "Worshiping Sister While Avoiding Them", is the clearest early answer because it turns Tai Fan's situation into a concrete plot event. The setup is You should learn from your sister;
Chapter 608, "Congratulations to Team Q for a Successful Escape!", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event.
Chapter 556, "Five-Year College Entrance Exam, Three-Year Simulation", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.