A really cool plot would be if there was a magical mix - up that made Harry Potter and Alex Russo swap powers for a while. Harry would have to deal with Alex's wandless magic and her family's crazy magical artifacts, while Alex would have to handle a wand and the more traditional magic of the wizarding world. This could lead to a lot of humorous and also intense situations as they both try to adapt and still fulfill their respective destinies.
Another plot could involve Alex accidentally traveling to the wizarding world of Harry Potter. She then has to figure out how to get back home while also getting involved in the fight against Voldemort. Since she has her own brand of magic, she could introduce some new tactics to the Order of the Phoenix.
One idea could be that Alex Russo uses her magic to help Harry Potter in a wizarding tournament. Maybe she disguises herself as a Hogwarts student and uses her unique magic skills, like her ability to freeze time briefly, to give Harry an edge in a difficult task.
One possible plot could be that Alex and Justin accidentally cast a spell that results in one of them becoming pregnant in a magical way. Maybe they were trying to solve a problem for a friend but something went wrong with the spellcasting.
One idea could be that Alex Rider is sent on a mission to Hogwarts undercover as a new student. He discovers the wizarding world while also trying to complete his MI6 task, which could be related to some dark wizard who has ties to a Muggle criminal organization. Another plot could be Harry Potter and his friends accidentally stumbling into one of Alex Rider's missions in the Muggle world and having to help him out using magic in a very discreet way. A third idea is that Alex Rider is revealed to have some latent wizarding abilities and he gets recruited by Dumbledore to help in the fight against Voldemort, bringing his unique set of spy skills to the wizarding war.
Alex Russo and Severus Snape would be a very dynamic duo. Snape is so strict and brooding, and Alex is so carefree. Alex might constantly try to break through Snape's cold exterior, and Snape would be exasperated by her unorthodox ways of doing magic. Their exchanges would be full of tension and, eventually, maybe some understanding as they realize they both have their own reasons for being the way they are.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.
A traveler could be from a different magical realm entirely and come to the Harry Potter universe. They bring with them unique magical abilities that both fascinate and frighten the wizards in the Harry Potter world. This could lead to a series of adventures where they either share their knowledge or are hunted down by those who fear the new magic they possess.
One idea could be that Hecate, being the goddess of magic, takes Harry Potter under her wing secretly to teach him ancient and powerful magic that Dumbledore doesn't know. This could lead to Harry having new abilities to fight Voldemort.
A possible plot in Harry Potter Planeswalker fanfiction is that a Planeswalker accidentally brings a dangerous creature from another plane into the Hogwarts grounds. This causes chaos as the teachers and students have to figure out how to deal with it. It could also be that a Planeswalker has a special connection to the magic in the Harry Potter world, like being able to sense the presence of magic in a way that wizards can't. They could use this ability to discover hidden secrets about Hogwarts or the wizarding families. Maybe a Planeswalker is on a quest in the multiverse and the Harry Potter world is just one stop on their journey, and their actions in the wizarding world have consequences for their overall mission.
One interesting plot could be a time - travel story in the Harry Potter wonderland. For example, a character goes back in time to the Marauders' era and gets involved in their adventures, while also trying to prevent a future disaster in the wizarding world. Another idea is a story where a new, powerful magic is discovered in the wonderland, and Harry and his friends have to figure out how to control it before it falls into the wrong hands. A third plot could be about an alternate reality where Voldemort won the war, and the remaining good characters have to find a way to reverse the situation in the harry potter wonderland.
One plot idea could be that Bella discovers she has a hidden magical ability that only Harry can help her understand and control. Maybe it has something to do with an ancient magic that's connected to Harry's destiny.
One interesting plot idea could be a fanfiction where the magic system in Harry Potter is reversed. Instead of wands being the main tool for magic, it's potions that can directly create magical effects without the need for incantations. Another could be a story where characters from different houses have to team up to solve a mystery that involves a new, never - before - seen type of magic that is slowly corrupting Hogwarts. And there could also be a fanfic where a Muggle - born discovers a way to use modern technology in combination with magic, creating a whole new form of spell - casting.