Perhaps the track could be contained in a package with some other Scorsese stuff that isn't on DVD and it would be up to the user to play the track (in whatever formats -- .mp3 or otherwise) with the movie instead of making a DVD purely for the commentary?
I mean, I don't know of much. The Color of Money has no features. The recent SE of Casino by Universal is missing the theatrical trailer. Bringing Out the Dead is kind of barebones. Anything?