A possible plot could involve the Ministry of Magic receiving reports of strange undead activity in Egypt. They send a team of wizards, including Harry Potter, to investigate. There, they discover that an ancient Egyptian curse has been awakened, similar to the mummy's curse. The wizards must work with local experts, who are like the characters from The Mummy, to break the curse and stop the spread of the undead.
One idea could be that the Philosopher's Stone gets stolen and hidden in an ancient Egyptian tomb. Harry Potter, Hermione, and Ron follow the clues and end up in the world of The Mummy. There, they meet the protagonists of The Mummy who are also on a quest. They join forces to find the Stone before it falls into the wrong hands, facing mummies, curses, and dark wizards along the way.
Well, perhaps the wizards in the Harry Potter world could team up with the adventurers from The Mummy series to fight a common dark magic threat. The mummies could be enchanted by some dark wizardry that combines the magic of both universes, and the characters would have to use their unique skills, like spells from Harry Potter and the combat knowledge from The Mummy, to defeat it.
The plot could involve a mummy that has been awakened in the wizarding world. It might be seeking revenge for something that happened in the past. Harry Potter, being the hero, would have to find a way to stop it. He could use his spells and knowledge of magic to try and defeat the mummy.
The characters from Harry Potter, like Harry himself, would likely be initially cautious around the more action - oriented and worldly characters from The Mummy. For example, Rick from The Mummy might find Harry's magic both fascinating and a bit unnerving at first. But as they face challenges together, they'd start to respect each other's skills. Hermione could share her vast knowledge with the group from The Mummy, while Evy could offer insights into ancient Egyptian lore that could help the wizards.
Well, it could be that the mummy's curse somehow spreads into the wizarding world. Harry Potter and his friends might have to use magic to stop the mummy's rampage. Maybe they discover ancient Egyptian magic that is related to the mummy and has to combine it with their own wizarding skills to defeat the evil forces behind the mummy.
Sure, it's quite possible. Fanfiction writers love to blend different fictional worlds. In a 'The Mummy (2017)' and 'Harry Potter' crossover, we could see the mummy's powers being pitted against the spells of Hogwarts students. Maybe the mummy is brought back to life in the wizarding world and causes chaos. There are endless possibilities for interesting storylines in such a crossover fanfiction.
Well, perhaps the magical creatures from the Harry Potter universe end up in the '300' setting. Dragons could be used by the Spartans to fight their enemies. The centaurs could also join the battle, lending their archery skills. And Harry could learn some combat skills from the Spartans, which he could then use back in the wizarding world to fight Voldemort's Death Eaters.
One possible plot could be that Naruto is on a mission in a desert area and accidentally stumbles upon an ancient tomb where the mummy resides. The mummy, having some sort of ancient and powerful chakra, senses Naruto's own chakra and mistakes him for an intruder or a threat. Naruto, being Naruto, tries to communicate and figure out what's going on instead of immediately attacking. This could lead to a series of events where they have to team up against a common enemy that is after the mummy's power and Naruto's unique abilities.
Perhaps the mummy has a power that can affect vampires in some way, like weakening their abilities. In this Twilight and the Mummy crossover fanfiction, the Cullens could team up with some mummy - hunters to find a way to neutralize this threat. They might have to travel to ancient tombs and decipher hieroglyphics to find a solution, all while dealing with other vampires or supernatural beings who want to use the mummy's power for themselves.
The Stargate could be a portal between different magical realms in the Harry Potter universe. For example, it could lead to a place where ancient and more powerful magic exists. Wizards from different schools around the world could team up with Stargate explorers to uncover the secrets of this new place. There might be a new threat emerging from this realm that requires both magic and Stargate technology to defeat. This would bring together characters like Harry Potter and Jack O'Neill to lead the charge against the common enemy.
Well, perhaps there's a rift in the multiverse that connects Central City to Hogwarts. The Flash, while chasing a villain, gets sucked into the wizarding world. Harry Potter and his friends initially suspect him as a threat but then realize his good intentions. They then combine their powers - the Flash's speed and the magic of the wizards - to fight a common enemy. For example, the Flash could use his speed to distribute protective spells all over Hogwarts really quickly, while Harry and his friends focus on the offensive magic against the bad guys.
One idea could be that Carly and her friends discover a magical portal in their apartment that leads to Hogwarts. They then have to navigate the wizarding world, with Carly being fascinated by all the magic. Meanwhile, Harry Potter and his friends are intrigued by the strange Muggle - like devices the iCarly gang has. They end up teaming up to solve a mystery that involves both the wizarding and Muggle worlds.