What are the best and worst prequels? This question covers novels, narrative poetry, TV shows, movies, comic books, and any other narrative fiction works. For the purpose of this question, a prequel is a prequel regardless of whether or not the author intended all along that the prequel would be made eventually or if they were convinced to write the prequel later based on feedback from fans or publishers or for some other reason, as long as the prequel was completed after the original work.
If the prequel was created by a different author or (for works with multiple authors) by a significantly different group of people, it counts if the prequel was authorized by the relevant copyright or trademark authors. A prequel created by a completely different person or group without any connection with the original author or the owner of the franchise doesn’t count, such as the prequel to Macbeth that your little sister wrote while drunk, or an unauthorized film of the life of Harry Potter’s grandparents that some fraternity did.