So you have an idea for a movie. Before you commit to doing any hard work, research what’s in development and production to make sure a competing project doesn’t already exist. Depending on where you’re at in your career, it’s likely the other project will take the wind out of your sails and render your screenplay dead in the water. The good news is that there are ways to protect yourself!
We usually think of Shakespeare as one of the most uniquely gifted writers of all time. But the truth is that very few of his stories are "original" in our sense of the word. In fact, only two of Shakespeare's thirty-eight plays have no known source. The rest were stolen -- that's right, stolen -- from specific, identifiable sources.