One idea could be that the Beast has a secret power that he reveals to Beauty during a dangerous situation. For example, he can control the elements to protect their castle from an invading force. Another plot could involve Beauty having a hidden past where she was once a princess from a far - off land and her family is searching for her. Or perhaps there could be a new character introduced, like a mischievous fairy who tries to create chaos between Beauty and the Beast by causing misunderstandings.
A great plot idea for a beauty and the beasts fanfic is to have Beauty learn some magic from the Beast. This could lead to her using the magic to transform parts of the castle into a beautiful garden. Also, the story could focus on the Beast's struggle to adapt to the modern world outside the castle. Maybe Beauty tries to introduce him to new technologies and social norms, which creates both humorous and heartwarming situations.
Perhaps Beauty discovers a hidden room in the castle that holds the past memories of the Beast in human form. This could lead to a deeper understanding between them and a new twist in their relationship. There could be old portraits, diaries, etc., that show his true self before the curse.
One idea could be exploring the Beast's past more in - depth. Maybe show his life before the curse and how it affected his personality. Another could be a modern - day retelling where Belle is a scientist trying to find a cure for the Beast's curse.
Perhaps the 'beauty' is a famous artist who is looking for inspiration. They meet the 'gasser', which could be some sort of otherworldly being. The 'gasser' shows the 'beauty' a different perspective on life and art, and this encounter changes the 'beauty's' artistic style completely. For example, the 'gasser' might take the 'beauty' to a parallel dimension full of strange and beautiful landscapes that the 'beauty' then tries to capture in their art.
One idea could be that the Queen of Love and Beauty has to prove her worthiness to keep her title. Maybe there are challenges set by the gods that she must overcome, like taming a wild magical beast. Another could be a love triangle where she is caught between a noble knight and a mysterious wizard, both vying for her heart. And perhaps she has to use her powers of love and beauty to heal a broken land that has been ravaged by war.
One idea could be that Belle discovers she's pregnant shortly after the curse on the castle is fully broken. This could bring a new sense of joy and anticipation to the castle. The Beast, now a prince again, might be both excited and a bit nervous about becoming a father. He could start making preparations like renovating a special nursery in the castle. Another idea is that during Belle's pregnancy, some of the enchanted objects in the castle could take on new roles as babysitters or helpers, adding a touch of magic to the pregnancy journey.
One idea could be that the sister of Beauty is a healer. She secretly tries to find a cure for the Beast's curse while also getting to know him in a different way than Beauty does. This could add a new layer of relationship and mystery to the story.
In a genderbend fanfic, the female Beast could be a sorceress who was betrayed and cursed. The male Beauty could be a traveling minstrel. His music has the power to soothe her and as he stays in her enchanted castle, they start to understand each other. The Beast begins to let down her guard and the Beauty discovers her true self beneath the curse.
One idea could be a story where Newt Scamander's magical beasts escape into Hogwarts. The students and teachers have to work together with Newt to recapture them. It would be a chaotic yet fun scenario as the beasts interact with the Hogwarts environment and its inhabitants.
One idea could be exploring the Beast's past more deeply. Maybe a story about his life before the curse, his relationship with his family and how it all led to his current situation.
One idea could be that Belle discovers a hidden garden in the Beast's castle that has magical plants which can talk and offer her advice. Another could be a backstory for the Beast, like how he got cursed in a more detailed and different way than in the original story. For example, he was tricked by a jealous wizard who wanted the castle for himself.