Making multiple films together. Normally Hollywood waits until it knows it's got a hit before ordering up a sequel, but that approach has problems. If they're lucky, the original writers will have left Sequel Hooks, but the seams will still be visible, and they've got to get the original cast back together. It's so much simpler to make the sequel before the first film is released. The stories can be written to fit together smoothly, and none of the cast are going to disappear, or demand more money. Movie multipacks come in three varieties. Two sequels for the price of one. Following a hit film with a two-pack of sequels, to complete the trilogy. Examples:
- Back to the Future
- The Matrix
- Pirates of the Caribbean
- Star Wars
- Avatar is going Up to Eleven with three concurrently filmed sequels, creating a Two-part Tetrology.
- The Three Musketeers (1973) (The Richard Lester version; was shot as one film but released as two. Lester got sued by some of the cast, who had only been paid for one film and felt they should have been paid for two.)
- Kill Bill
- Superman; written as a 5-hour epic, shot as two movies, though the second was mostly reshot after Richard Donner was fired.
- Death Note
- The Lord of the Rings and The Hobbit
- Avengers: Infinity War