Well, one possibility could be that Harry discovers a magical portal that leads to another planet. He leaves Earth because he's on a quest to find a powerful magical artifact that is said to be hidden in a far - off galaxy. Once he leaves, he has to deal with all kinds of strange new creatures and different forms of magic.
Dumbledore could also play a role even if Harry has left Earth. Maybe his spirit or some form of his magic reaches out to Harry from afar, guiding him on his journey and providing him with cryptic advice to face the challenges in outer - space - related magic.
One possibility could be that Harry Potter leaves Earth to explore other magical realms in the universe. Maybe he discovers a planet where magic is used in completely different ways than on Earth. He could encounter new magical creatures and make friends with beings who have powers he's never seen before.
There's a chance he meets a group of nomadic magic - users. These are people who travel across the universe in search of new sources of magic. They could introduce Harry to different forms of magic that are not based on the traditional elements like fire, water, earth, and air that he's used to on Earth. Instead, they might use things like starlight or cosmic energy as a basis for their spells.
Yes, there might be such fanfiction in the vast world of fan - created works. Fanfiction often explores unique and sometimes out - of - the - ordinary scenarios. However, this particular concept seems rather unconventional and might not be as common as more traditional fanfiction themes within the Harry Potter fandom.
If Goku leaves Earth, his family would be greatly affected. Chi - Chi would be worried sick, and Gohan and Goten would have to grow up faster. They might become more independent and focus on their own power development. In the story, this could lead to new character arcs for them.
Perhaps he'll meet other demigods who have also left Earth for various reasons. They could form a new group and face new challenges together. For example, they might have to deal with a powerful alien being who wants to use their demigod powers for its own evil purposes. Percy would then need to use his wits and strength to lead the group and find a way to defeat this new enemy.
He could go to the Underworld of another planet, if such a place exists in the universe he lands in. It might be filled with different kinds of dead souls and ruled by a different kind of Hades - like figure.
He might leave to protect Kara and the unborn child. Maybe he discovers that there is some kind of danger following him that could put them in jeopardy, so he decides to sacrifice his time with them to keep them safe.
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.