The writers, Ted Elliot and Terry Russio, were hired to write a movie based on the all-time favorite Disney attraction. Pirates of the Caribbean, was originally thought of by Walt Disney himself. He made a ride called Pirates of the Caribbean. That is why we have the movies now.
Yes since Walt Disney created the attraction Pirates of the Carabean which is featured at Walt Disney World in Florida & Disneyland in California.The movies are based on the ride and it is a Disney film.
One of Walt Disney's favorite things to do was to brainstorm new fictional characters that he could write novels and movies about. Once his amusement park had opened up, he loved walking about and talking with his guests.