Another development could be that Naruto starts to understand the world outside the Hidden Leaf better. His encounter with Pain, who had his own ideology about peace, makes Naruto question his own views. So, he might embark on journeys to other villages to learn more about different cultures and ways of achieving peace, which in turn changes his perspective on many things.
Often, Naruto's relationships with other characters are explored further. He might have deeper conversations with Sasuke, trying to convince him to come back to the village for good. His bond with Sakura could also develop in different ways, perhaps becoming a stronger friendship or even something more romantic in some fanfictions.
One possible plot development could be Naruto focusing on rebuilding Konoha. He might use his newfound influence and power to inspire the villagers and make Konoha stronger than ever. Maybe he starts new training programs for the ninja of the village to better prepare them for future threats.
One possible plot development could be Naruto's internal struggle with the newfound power and responsibility. He might start to question his own limits and how to better protect the village in the future. Another could be the rebuilding of Konoha. Naruto could be deeply involved in the restoration efforts, both physically and mentally, trying to bring back the hope and strength to the villagers.
One possible plot development could be Naruto's efforts to rebuild Konoha. He might focus on strengthening the village's defenses and training new shinobi. Another could be his exploration of new jutsu, inspired by his battle with Pain. He could also work on improving relations with other villages.
In this kind of fanfiction, Naruto might be welcomed as a hero. The village could start to rebuild with his leadership. People would look at him with newfound respect and admiration.
Well, one possible plot could be Naruto coming back to the village and being hailed as a hero. He might then focus on rebuilding the parts of the village that were damaged during the Pain attack. He could also start training the next generation of ninja, sharing his newfound wisdom and strength.
He could meet Hinata, and their relationship might develop further. Maybe she would be the first to greet him and express her admiration more openly.
One possible plot development could be Naruto's friends rallying around him. They might seek out medical help, like Sakura using her skills to stabilize him at first. Then, they could start planning revenge against Pain. Another could be Naruto having some sort of vision during his injury, perhaps about his parents or a new power he could unlock to defeat Pain in the future. And, his sensei, Kakashi, could take on a more protective role over him as he recovers.
Anko might develop a softer side through her interactions with Naruto. She has a tough exterior due to her past, but Naruto's unwavering optimism and kindness could start to break down her walls. She could become more open and trusting towards others in general.
Unique character development. In a great fanfiction, Naruto's growth from the start of the battle to the end should be significant. He could learn new skills or gain a deeper understanding of himself. For instance, he might realize the true meaning of being a ninja during the fight with Pain.