The plot could center around the child trying to understand their parents better. In the future, they may have heard only stories about Harry and Ginny's heroics. By coming back, they get to see their parents as young people, with all their insecurities and hopes. They might also get involved in the Hogwarts life of their parents, make new friends among their parents' friends, and in the process, learn important lessons about family and love.
One possible plot could be that the child from the future comes back to prevent a great disaster. Maybe a dark wizard in their future time has found a way to rewrite history and the child has to make sure Harry and Ginny meet and fall in love at the right time. The child might also have some special powers inherited from their parents which they use to face various challenges in the past.
Perhaps the story could be about the child coming back to help their parents in a specific battle that they know will be crucial for the future. They could bring some advanced magical knowledge or artifacts from the future. For example, they might know of a spell that can counter a powerful dark magic that Voldemort is about to use, but they have to be careful not to disrupt the timeline too much while using this knowledge.
It could be a new dark wizard who has risen to power in the future and is trying to change the past to gain more power. This villain might be jealous of Harry's fame and Ginny's influence in the wizarding world, and by changing the past, they hope to rewrite history in their favor.
One possible plot could be that they see a future where the wizarding world is in great danger again. So they start to train young wizards secretly to prepare for the upcoming threat.
Well, one possibility could be that the kids from the future come back to prevent a great disaster in the present. Maybe a dark wizard that was defeated in their time has somehow found a way to be reborn in the past (the present in the story), and they need to stop it before it's too late.
Hermione Granger - Weasley is also quite popular. She's smart and resourceful, and in fanfictions related to the Cursed Child, she might use her vast knowledge of magic to help Harry and Ginny deal with the aftermath of the Cursed Child events. Ron Weasley is another character that features prominently. His humorous nature and his loyalty to his friends can add some light - hearted moments to the often - dark themes associated with the Cursed Child in fanfiction.
One plot twist could be that Harry is actually protecting Ginny and the real father. He might know some dark secret about the father that would put them in danger if it were known, so he pretends to be in the dark about the situation.
Harry might be initially in shock. He can't believe Ginny would leave him and their child. He could become withdrawn, not really knowing how to deal with this new situation.
It could be a new dark wizard that they see in the future. Maybe someone who was overlooked during the fight against Voldemort but has been secretly gathering power.
Well, perhaps they will discover that magic has merged with Muggle technology in the future. Harry and Ginny could be amazed to find flying cars that are powered by both magic and electricity. They may also encounter new forms of dark magic that they have to fight against, or they might see a future where the wizarding world has achieved complete peace and harmony, and they play an important part in maintaining that peace.
One possible reason could be miscommunication. Maybe they had a big fight over how to raise their child and Ginny, feeling unheard, decided to leave. Another reason might be external pressure. For example, if some dark forces were targeting their family again and Ginny thought leaving would keep Harry and the child safer. Or perhaps Ginny had some personal issues she couldn't deal with while being in the family, like feeling she lost her own identity in the relationship.
Harry Potter and Ginny Weasley had three children. The eldest son was James Sirius Potter, named after Harry's father and godfather, and he studied at Hogwarts School of Witchcraft and Wizardry, Gryffindor House. The second son was Albus Severus Potter, named after Dumbledore and Snape. The youngest daughter was Lily Luna Potter, named after Harry's mother and good friend Luna. Lily inherited her grandmother's long red hair and studied at Hogwarts Gryffindor House. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!