They could go on a quest to discover hidden magical artifacts. For example, they might search for ancient spells that were lost during the war. This would not only be exciting but also help in the restoration of the wizarding world's magical knowledge.
One possible adventure is exploring the Forbidden Forest more thoroughly. Since the danger of Voldemort is gone, they can now freely investigate the mysteries it holds. They might encounter new magical creatures and learn about their habitats and behaviors. Another adventure could be traveling to other wizarding schools around the world to share their experiences of the final battle and learn from different magical cultures.
They might also embark on a diplomatic mission. With the wizarding world in a state of flux after the war, different magical communities need to be brought together. Harry, as a well - known figure, and Ginny, as a respected witch, could visit other wizarding countries to establish alliances and promote cultural exchange. This would involve meeting different magical customs, dealing with political intrigue, and making new friends and enemies along the way.
They might have an adventure where they stumble upon a hidden magical grove. In this grove, there are plants with unique magical properties that they've never seen before. They could spend time studying these plants and perhaps even discover a new potion ingredient.
They might have adventures like exploring hidden parts of Hogwarts that they never knew before. Maybe they find a secret room filled with ancient magic spells.
After the final battle, Harry and Ginny's relationship in fanfiction can take many different paths. Some fanfictions depict them as immediately getting engaged and starting to plan their future together. Others show them taking it slower, with Harry dealing with his PTSD from the war and Ginny being there for him every step of the way. They might also get involved in the rebuilding of the wizarding world, working side by side, which further cements their relationship.
They could go on a mission to track down remaining threats from the war. There might be rogue ninjas or hidden enemy bases. Naruto's combat skills and Temari's strategic mind would make them a great team.
One adventure could be that Harry and Fleur have to protect the black ring from dark wizards who want to use it for evil purposes. They might have to travel to different magical locations, like hidden wizarding villages or ancient ruins. Along the journey, they would encounter challenges such as magical traps and spells. Fleur's skills in magic, especially her Veela charm, could come in handy in dealing with some of the adversaries. Harry, with the black ring, might discover new powers within himself that he has to learn to control in order to succeed in their adventures.
They could go on a mission to find a rare magical creature that is important for some reason. Maybe it has a power that can help defeat the dark forces. Or they might travel to a hidden magical place that Lupin once knew about from his own adventures as a young wizard. There, they face various challenges and have to use their combined knowledge of magic to get out safely.
Perhaps they embark on a journey to rescue a captured magical being. They'd have to face dangerous dark wizards along the way. Harry would use his combat skills, Bill his strategic thinking, and Dom their ability to communicate with the magical environment to find and free the being.
They could face financial challenges. Raising a child in the wizarding world can be expensive, especially if they want to give their child the best education at Hogwarts. And Ginny's career as a Quidditch player might be affected by the pregnancy, which could also be a source of stress for them. Moreover, they might have to deal with over - enthusiastic friends and family who want to be too involved in their new family life.
Obviously, Harry Potter himself would still be a central character. He would be dealing with the aftermath of the battle, like post - traumatic stress or trying to bring about positive changes in the wizarding world.