I would like to write a book that is a sequel to a 2009 movie. I worked out a screenplay but it seems clear that the movie industry will not work on a sequel without permission of the rights owners of the original even if it passes the derivative work test.
I have tried to contact the originators of the movie but their web site says “Please be aware that any pitches or screenplays will be deleted. We are not looking for other people’s ideas.” So it seems that selling the screenplay will go nowhere.
If however I write a novel that takes over where the movie left off that alludes to the plot of the movie as historical events and recycles a few of the characters, would that pass a reasonable derivative work test?