He could meet his future children, if he has any. They would likely be powerful wizards or witches with their own adventures. Also, he might run into the future versions of Hermione and Ron. They would probably be in important positions in the wizarding world, like Hermione might be a headmistress at Hogwarts or something.
In this fanfiction, Harry might see a world where magic has evolved in unexpected ways. For example, there could be new spells that are far more powerful and complex than the ones he knew. He could also find that Hogwarts has changed, perhaps with new buildings or different teaching methods. And maybe he would encounter descendants of his friends, who have their own unique stories to tell.
Well, perhaps Lily Potter discovers a magical time - traveling device. She could end up in a future where Hogwarts has changed drastically. Maybe there are new spells and magical creatures that she has to adapt to. And she might meet her descendants or future versions of her friends.
A movie that traveled to the future might describe the challenges and difficulties that humans faced in the process of technological development in the future, or describe the political, economic, and cultural changes of a future society. In such a movie, there might be a variety of different characters, including scientists, inventor, politicians, businessmen, etc. They played an important role in different fields and jointly promoted the future development of society.
Movies that traveled to the future might also involve supernatural elements such as time travel and time travel. These elements might trigger a series of amazing sci-fi plots. At the same time, such a movie might also explore the evolution of human beings, the nature of human beings, and other issues to make the audience think about the meaning and value of human existence.
A movie that traveled to the future could have many different topics and elements, allowing us to enjoy a rich and colorful movie experience.
Maybe Neville. He has grown a lot in his magical abilities and his courage. He could bring his knowledge of herbology, which might be useful in different parts of the world. Luna Lovegood could also be a great companion. Her unique perspective on magic would help Harry see things in a different light during his travels.
He might meet the future versions of his friends like Hermione and Ron. Their children or grandchildren could be there, and they might have different personalities and magical skills compared to their predecessors.
He'd first have to get used to the new technology. If there are new magical devices, he'd need to learn how to use them. For instance, if there are advanced wands with extra functions, it would take him some time to figure them out.
Common characters he could meet include an au Ginny who is a powerful seer. There might be a Hagrid who is a tiny, timid man instead of the large, boisterous one we know. He could also encounter an au Sirius Black who is a Death Eater, which would be a shocking twist. Additionally, he may run into an au Professor McGonagall who is more of an artist than a Transfiguration teacher.
Well, in such fanfiction, Harry Potter could meet different versions of Dumbledore. In one universe, Dumbledore could be a dark wizard instead of the wise mentor we know. He may also come across alternate versions of Sirius Black. Maybe in some universes, Sirius is still in Azkaban for a crime he actually committed. Additionally, he could meet different versions of Luna Lovegood, some of whom might have no interest in the strange and wonderful things she loves in the original universe.