People usually say that Opera is very elitist. As a classical music and opera junky and realized that it is partially true. "Partially" because most of the pieces written in opera are inspired by novels or dramas that most people know or have heard of. So I have a project to novelize an opera that I dearly love. Can I write the novelization of an opera, let's say Carmen by Bizet, with the expectation to get it published, without being sued by a Bizet's association of some Bizet's relatives (if he still has some alive)?