Perhaps Albus Severus could travel back to the time of the founders of Hogwarts. He could learn magic from them directly and bring back some of the ancient spells and knowledge to the present. This would not only change his own abilities but also how magic is perceived and taught in the modern wizarding world. He would also face the challenge of fitting into that very different time period.
One idea could be Albus Severus Potter traveling back in time to meet his father, Harry Potter, as a young student at Hogwarts. He could then help his father in some of the early battles against Voldemort, using the knowledge he has from the future. This would create a lot of interesting interactions and changes to the original story line.
A cool idea could be that Albus Severus Potter discovers he has a unique magical ability that no one in his family has ever had. This ability could lead him on a quest to find out more about its origin, which might be tied to an ancient and forgotten part of wizarding history.
One idea could be that they travel back to the time of the founders of Hogwarts. They might accidentally change something small that has a huge impact on the present day. For example, they could prevent one of the founders from making a key decision about the sorting hat, which then changes the way students are sorted in their time.
Well, a plot could revolve around Albus making unexpected friends in Slytherin. He might find those who are also outsiders in a way, like a half - blood who is looked down upon by the pure - blood elitists in the house. Together, they could work on changing the perception of Slytherin from within. Also, there could be a mystery in the Slytherin common room that Albus is determined to solve. It could be related to a former Slytherin's dark secret that has been plaguing the house for generations.
One interesting Albus Potter time travel fanfiction could be where he travels back to the time of the Marauders. He gets to see his father and his friends in their youth, and maybe even gets involved in some of their adventures. This can lead to a lot of interesting character interactions and plot twists.
One possible antagonist could be a dark wizard from the past who somehow catches wind of Albus Severus' time - traveling and decides to use his knowledge of the future for his own evil purposes. Maybe a forgotten Death Eater who was thought to be dead but actually survived in hiding and now sees this as an opportunity to rise again.
One idea could be Albus and Scorpius getting lost in an alternate magical dimension during one of their adventures. They have to rely on their wits and newfound magic to find their way back. Another could be Albus discovering a long - lost family secret that changes his perception of his family's legacy.
One great fanfiction could be about baby Albus Severus Potter's first magical experience at home. Maybe he makes the toys fly around his nursery by accident. Another could be a story where he has a special connection with his family's old magical artifacts as a baby. There are also fanfictions that might focus on his relationship with his parents as a very young child, showing the love and care they give him.
Perhaps Albus discovers that his Parselmouth ability is linked to a prophecy. As he tries to understand the prophecy, he has to deal with the fact that some people in the wizarding world see Parselmouths as dark wizards. He teams up with some unlikely allies, like a group of Gryffindors who initially distrusted him but come to see his value. They embark on a journey to fulfill the prophecy and save the wizarding world.
One interesting plot could be that they travel back to the time of the Marauders. James and Lily could meet their parents when they were young and see how different Hogwarts was back then. They might get involved in some of the Marauders' pranks and also learn some secrets about their family's past that were long forgotten.
A possible plot twist could be that Albus's Parseltongue ability is actually a curse in disguise. At first, it seems like a cool power, but then it starts to have negative effects on him, like attracting dark creatures.