One of the first things we did together was get the rights to “Eyes Wide Shut.” It’s called “Traumnovelle” and he was very much in love with that story, but it proved to be just too difficult, so he dropped it. He had already a contract with Warner Brothers ready to go and he pulled out. He chewed over it for thirty years. When he finally made it he really considered it his greatest contribution to the art of filmmaking. Many people wouldn’t agree with him but that doesn’t really matter.

– Jan Harlan

I knew he was quite proud of the movie, but I never realized it was to this degree. I’d be curious to know more details around the “final cut” of the movie. Everything I’ve read has suggested it was not finished before he passed away and a little work remained to be done. It’d be interesting to know exactly what those details were.
source: Indiewire