I wonder if you can truly approach movies like start-ups. What would it look like to build an MVP for a movie? Is that the script? How do you get enough people

I wonder if you can truly approach movies like start-ups. What would it look like to build an MVP for a movie? Is that the script? How do you get enough people to look at it to truly evaluate the concept? Perhaps this is why books that sell well are made into movies - proven customers.