For a 'naruto from the heart fanfic', you might consider writing about Naruto's experience with the Akatsuki. Not just the battles, but how it affected him on an emotional level. How did he feel when he faced Pain and saw the destruction of the village? What was going through his heart when he decided to forgive Nagato? These are deep emotional aspects that can be explored in the fanfic. You could also explore Naruto's heart - based growth as a leader. How his values and his big heart influenced his decisions when leading his team or the village.
One idea could be a time - travel fanfic where Naruto or Sasuke go back in time and try to change certain events. This would allow for a lot of creative storytelling as they interact with their younger selves and try to prevent future tragedies.
One idea could be to create an alternate universe where Naruto has a different elemental affinity from the start. For example, instead of wind, he has lightning. Another could be a fanfic focused on the relationships between the characters outside of the main plot, like how Sakura and Ino rekindle their friendship in a more in - depth way. Or you could write about Naruto's training journey with a different mentor, say Jiraiya's long - lost brother who has a completely different teaching style.
One idea could be a fanfic where Naruto travels to a different dimension where the Akatsuki are the heroes. Another could be a story about Naruto's kids growing up in a world where there's a new threat that they have to face without their parents' immediate help. And a third idea is a fanfic where Naruto discovers a hidden bloodline within himself that gives him unique powers.
One idea could be creating an OC who is a healer from a far - off land that enters the court. This OC could bring new medical knowledge and stir things up with their different ways. Another idea is an OC who is a skilled archer, a commoner but with extraordinary talent, and gets involved in the palace intrigues because of their skills. A third idea might be an OC who is a mysterious fortune - teller whose prophecies start to come true and cause chaos in the Scarlet Heart world.
You could also write a fanfic that explores an alternate ending. Instead of the somewhat tragic ending of the original, give the characters a more positive outcome. Perhaps the princes find a way to work together and bring about a peaceful transition of power, and the main character gets to have a happy life with the one she loves without all the political turmoil and heartbreak.
In 'naruto wings fanfic', often there are ideas related to the origin of the wings. Are they a result of some new form of chakra? Or perhaps they are a gift from a mysterious entity. The fanfic might also delve into how the wings affect the character's relationships. For instance, do their friends become jealous of their new powers, or do they attract new allies who are interested in the wings' capabilities?
Another interesting aspect could be femto Naruto's impact on the ninja world. Since he would be different in this form, he might introduce new jutsu or ways of thinking. He could inspire younger ninjas to think outside the box and break traditional boundaries in their training and combat.
Another idea is a crossover where the world of Naruto is invaded by Honkai. The shinobi have to learn about Honkai technology and powers quickly to defend their villages. Sakura might study Honkai biology to find a way to counter the threat, while Sasuke could be intrigued by the dark powers of the Herrschers and struggle with the temptation to use them for his own goals.
One interesting idea could be how the laws of the Naruto universe are explored. For example, how the ninja code functions as a form of law among the ninja clans. It might also look at how different villages have their own rules regarding things like chakra use and shinobi behavior.
One idea could be Naruto becoming a mentor to a new generation of ninja. He could pass on his unique skills and the importance of friendship and hard work.