Well, it could be really interesting. Maybe Anubis takes Harry on a journey through the Egyptian underworld in the fanfiction. Harry, being used to the wizarding world of Hogwarts, would be exposed to a whole new set of rules and magic in this strange underworld. He could meet other Egyptian deities and gain knowledge that would be useful in his own magical battles back in the UK.
In a 'Harry Potter meets Anubis' fanfiction, their power levels would depend on the context. Harry is a very talented wizard, but Anubis is a deity. However, Harry has defeated Voldemort, which shows his great power. If they were to face off, Harry might be able to hold his own for a while using his quick thinking and magical skills. But Anubis' power is more fundamental, related to life and death itself. So overall, Anubis would probably be more powerful, but Harry could surprise him with his resourcefulness.
Well, he might gain some unique powers. Anubis is associated with the afterlife in Egyptian mythology. So Harry could learn about different forms of magic related to death, like perhaps advanced defensive spells against dark magic that has to do with death curses. He might also develop a new understanding of life and death, which could change his perspective on fighting Voldemort.
Well, in such a fanfiction, perhaps Harry could seek Apollo's help in dealing with some of the dark magic threats at Hogwarts. Apollo's powers related to the sun and prophecy might give Harry an edge in his battles against Voldemort.
Well, perhaps Harry Potter could be on a magical adventure in a far - off land where he encounters a Kirin. The Kirin might help him find a hidden magical artifact that is crucial for defeating Voldemort. It could also be that the Kirin has some unique magical powers that Harry has to learn about in order to progress in his journey.
One possibility is that Harry would learn the real motives behind some of the actions of the Hogwarts teachers. Maybe Dumbledore had some other reasons for keeping certain secrets from him all along. It could also be that the truth about the relationship between different magical creatures and wizards is revealed, like why some were always seen as more dangerous than they really were.
In this fanfiction, Eminem might be a Muggle who discovers the wizarding world through Harry Potter. He could then introduce his style of music to Hogwarts, and the students would be either really into it or completely baffled. For example, the Weasley twins could use Eminem's beats to create new magical pranks. They might set up speakers in the hallways that play his music, and when people walk by, they get hit with a spell that makes them dance uncontrollably. It would be a wild and fun addition to the Hogwarts atmosphere.
Well, it could be a total chaos. Harry Potter's magical world is all about order in a way, with Hogwarts rules and the fight between good and evil in a more traditional sense. The Joker, on the other hand, is the agent of anarchy. Maybe he'd start causing mayhem in Hogwarts, like turning the moving staircases into death traps or making the portraits go berserk. And Harry would have to use his magic in really unorthodox ways to stop him.
There could be a situation where Nagini is in a weakened state for some reason. Harry, being the hero he is, might face an internal struggle. On one hand, he knows Nagini is Voldemort's pet and has been involved in many evil deeds. But on the other hand, he might see her as a victim of Voldemort's dark magic. So he could either try to kill her or try to free her from Voldemort's control.
Well, perhaps Harry could use his magic to help Superman understand some of the more mysterious aspects of the wizarding world, like thestrals or time - turners. And Superman could show Harry how to use his super strength in a more strategic way, like when fighting Voldemort's Death Eaters.
Well, perhaps the Doctor could use the TARDIS to visit Hogwarts. He might help Harry and his friends with some really tough magical problems using his advanced alien technology. For example, when they face Voldemort, the Doctor could come up with some out - of - the - box solutions that the wizards never thought of.