One idea could be that Voldemort discovers the power of the Stargate and tries to use it to gain more power. He could send his Death Eaters through the Stargate to conquer other worlds and bring back resources or powerful artifacts to help him in his quest to take over the wizarding world. The Order of the Phoenix would then have to follow through the Stargate to stop him.
In a 'Harry Potter and the Stargate' fanfic, it would be cool if the Hogwarts students were introduced to the technology of the Stargate. Hermione would be fascinated by the scientific principles behind it, while Ron might be a bit more skeptical. They could work together with the Stargate teams to solve a problem that threatens both the wizarding world and the worlds accessible through the Stargate, like a dark magic that spreads through the Stargate network.
A possible plot is that a powerful magical artifact in the wizarding world is actually a key to an ancient Stargate on Earth that has been long forgotten. Harry and his friends, along with the Stargate team, embark on a quest to find this Stargate. Along the way, they face challenges from dark wizards who also want the artifact for their own evil purposes and the Goa'uld who sense the power of the artifact. They must work together, using both magic and technology, to reach the Stargate and unlock its secrets.
The plot could involve Harry using his magic in the Stargate universe. Maybe he could use spells to help the Stargate teams in their battles against the Goa'uld. For example, a simple Stunning Spell could be very useful against the Jaffa warriors. He could also use magic to decipher some of the ancient technologies that the Stargate teams come across, since he has experience with ancient magic in his own world.
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.
One possible plot could be that Hogwarts students discover a Stargate on the school grounds. Maybe it was hidden by a powerful wizard in the past who had visited other planets through it. The students, led by Harry Potter, could then start to explore different planets through the Stargate. They might encounter alien races that have magical abilities similar to theirs, leading to a cultural exchange of magic and technology.
Well, perhaps Harry Potter discovers some ancient magic that has the potential to create a stargate. He might use his knowledge from Hogwarts and the wizarding world to assemble the components of the stargate. Maybe he's on a quest to find a new form of magic or a lost spell that is only accessible through the stargate.
One interesting crossover could be the use of Stargate's technology in the Harry Potter universe. For example, the Stargate could be a magical object that transports wizards to different wizarding worlds or even other planets. Another idea could be that some Stargate characters end up at Hogwarts and have to learn magic to survive. They might introduce their own technology and knowledge, creating a whole new dynamic within the school.
Well, one possible plot could be that Harry Potter discovers a Stargate during his travels. He then gets transported to a new world where he encounters a group of powerful and diverse characters who form a harem around him. They all have different magical abilities from both the Harry Potter universe and whatever new universe the Stargate leads to. Together, they embark on a journey to stop an evil force that threatens both worlds.
One interesting idea could be the combination of magic from Harry Potter and the advanced technology of Stargate. For example, perhaps wizards using their magic to enhance or interact with Stargate technology. Maybe a wizard could use a spell to stabilize an unstable wormhole. Another idea might be characters from Harry Potter traveling through the Stargate to different planets and encountering new species and cultures, much like in the Stargate series. They could bring their magic with them and use it in unexpected ways in these alien environments.
One idea could be that during a Quidditch match, a player gets seriously injured. Instead of using magic to heal right away, an ambulance from the Muggle world is called in by a confused bystander. The ambulance crew has to deal with the magical aspects they've never seen before while trying to transport the patient to a Muggle hospital. This could lead to a lot of comical and also tense situations as they try to figure out how to handle the situation.
One idea could be a wizard discovers Beyblades in the Muggle world and decides to bring them to Hogwarts. He then challenges his classmates to Beyblade battles instead of duels. The different houses could form their own Beyblade teams and compete in a tournament, with the winning house getting extra house points and a special magical Beyblade as a prize.