Some fanfictions might explore what would happen if a Fantastic Beast escaped into a non - magical world. Picture a story where a Thunderbird ends up in a big city like New York in the Muggle world. How would the Muggles react? And how would Newt and his friends try to retrieve it without causing too much chaos and without revealing the wizarding world?
One idea could be a crossover with the Harry Potter universe. For example, Newt Scamander could meet Harry and his friends and they could go on an adventure together to find a new and extremely dangerous fantastic beast that has escaped from Newt's case. Another idea is a crossover with a historical fantasy world, like Camelot. Newt could travel to Camelot and help King Arthur's court deal with a magical beast that is terrorizing the kingdom.
One idea could be to create a crossover where Naruto characters visit the world of Fantastic Beasts. For example, Naruto could befriend Newt and they go on an adventure to find a lost bijuu that has somehow ended up in the Fantastic Beasts universe. It would be exciting to see how Naruto's ninja skills would interact with the magic in that world.
One interesting storyline could be about the origin of some of the fantastic beasts. For example, a fanfiction might explore how the Hippogriff came to be. Another could be a story that focuses on the relationships between different characters from both series in a new and unexpected way, like a friendship between a Hogwarts student and a wizard from the Fantastic Beasts era.
Perhaps a dark wizard in the Fantastic Beasts world tries to use Merlin's power for evil. Merlin has to team up with Newt and Tina to stop this wizard. Along the way, Merlin discovers new magical abilities within himself as he faces the different magical challenges presented by the Fantastic Beasts world.
One idea could be an OC who is a secret healer for magical creatures in the Fantastic Beasts universe. They could have a special connection with a rare and endangered beast, like a Thunderbird. The OC's mission could be to protect the beast from dark wizards who want to use its power for evil.
A great storyline could also be a crossover within the Harry Potter universe. Imagine a situation where characters from the Harry Potter books meet those from the Fantastic Beasts world. Maybe Harry and his friends stumble upon Newt's case of beasts during one of their Hogwarts adventures, and they have to work together to solve a problem caused by a mischievous beast that has escaped.
One idea could be exploring the backstory of a minor character from the series in the fanfiction. For example, delving into the early life of Luna Lovegood's father. Another could be a story where a new magical creature is discovered in the Forbidden Forest and how the Hogwarts students interact with it. Or perhaps a fanfiction where the events of the Fantastic Beasts movies intersect more directly with the main Harry Potter storyline, like Newt Scamander visiting Hogwarts during Harry's time there.
Some interesting aspects could be unique character interpretations or alternate storylines that expand the magical world.
One common crossover could be with the 'Harry Potter' universe. It's exciting to see how characters and magic from both interact.
One idea could be that Newt Scamander visits Hogwarts to give a special lecture on fantastic beasts. During his visit, he discovers a hidden magical creature that has been living in the Forbidden Forest for centuries. Harry Potter and his friends get involved in helping Newt study and protect this new discovery.