Pop quiz for you. Don’t worry, it’ll be easy to answer. Have you ever read any licensed literature? Like Star Wars books, or Star Trek, or Warhammer, or … Sands, really any licensed property? Or maybe seen a tie-in TV show to a movie? Played a game of a movie or a book?
Basically, anything that could be considered “secondary canon?”
Right. I can already tell I’ve lost some of you. So let’s back up. Let’s say you are a movie producer. Better yet, you’re one of those producers like James Cameron who often writes, produces, and directs your own movies. And you’ve just made a hit.
Now, with this hit on your hands, someone has come to you and asked for a chance to expand on the universe! They want to write a trilogy of books that tie into the movie and extrapolate a bit after it! Awesome!
But … you don’t want to write a trilogy of books. You want to keep making movies.
“No problem!” says the publisher with the contract. “We’ve got an author lined up! They’ll write all three. We just need some notes on the movie, for you to answer some questions, and that’ll be all we need!”
So you sign the paper, and the trilogy comes out. You collect a small licensing fee, and a bunch of fans of your movie go on to read the book and form excited theories and ideas.
Except … a year or two later, when you sit down to write the sequel, you’ve got a bunch of ideas that don’t quite mesh with the world and liberties the author of the book trilogy took to flesh out their story. Not that you know this: You probably haven’t read them. Or, if you did read them, you’d know the score as being thus—
The movie came first, therefore the movie is the final word.