Cruella de Vil from '101 Dalmatians' has an origin story that might be related to her obsession with fashion. Her desire for a fur coat made from the Dalmatians' skins was extreme. It could be that her upbringing in a fashion - centered world made her view the dogs as mere objects for her to achieve her sartorial dreams, thus making her a villain.
A mashup of 'Pulp Fiction' could be a creative combination. For example, it could be a musical mashup that combines the iconic soundtrack of 'Pulp Fiction' with other music genres. Maybe some DJ has blended the surf - rock and funk tunes from the movie with modern electronic beats to create a unique auditory experience.
One possible plot could be that the villain recruiters target a young and impressionable character from a new Disney story. They try to convince this character that the villainous way is the path to power and freedom. For example, they might offer the character magical abilities in exchange for joining their ranks. The story could then follow the character's internal struggle between good and the allure of the villains' offers.
Well, a big theme is the humanization of the villains. In fan fiction, writers might show that the villains have emotions and reasons for their actions that we don't see in the movies. For example, Cruella de Vil might be shown as having a troubled past that led to her obsession with fur. Also, the theme of alternate universes is quite popular. It could be an alternate universe where the villains are the heroes or where they succeed in their evil plans. There's also the theme of love and relationships for the villains. Maybe a fan fiction about Ursula falling in love with someone unexpected.
One common theme is envy. Many Disney villains are envious of the heroes or others' good fortune. Like Scar in 'The Lion King', he was envious of Mufasa's position as king.
One popular mashup fiction book is 'Pride and Prejudice and Zombies'. It combines the classic story of 'Pride and Prejudice' with the horror element of zombies, creating a unique and entertaining read. Another is 'Abraham Lincoln: Vampire Hunter', which mashes up historical facts about Lincoln with the fictional concept of vampire hunting.
Well, in an anime mashup novel, one key element is the blend of different anime universes. For example, characters from a shonen anime might interact with those from a magical girl anime. Another element is the plot which often has to be carefully crafted to make these different elements fit together. And the art style, even in written form, might be influenced by the distinct visual styles of the animes being mashed up.
One idea could be having Maleficent and Ursula team up. Maleficent could use her dark magic to help Ursula get more powerful in the ocean realm. Maybe they plot to take over both the land and the sea. They could start by causing chaos in the kingdoms near the shore, like making storms and scaring the fishermen.