Criterion or Shout/Scream Factory must release this on blu-ray/DVD

What is this dispute you are referring to?

I had heard some people suggest that it involved Howard Blake and the use of his theme from "The Snowman". I find that hard to believe considering this quote from Blake:

In late 1982 I was scoring the American version of 'The Lords of Discipline' in Hollywood and working into the small hours to finish it. One night the phone rang in my suite in the Chateau Marmont. It was director/producer Michael Mann who told me about an extraordinary film he was making called 'The Keep', a strange and ambitious project that somehow combined Nazi occupation in Rumania with monsters and the supernatural. He had decided to have an all-electronic score and was working with 'Tangerine Dream'. They however had just heard 'Walking in the Air' which apparently had been a revelation to them. Michael asked if I could collaborate with them to incorporate my 'Snowman song' into the film. I explained that I was working flat out on a rewrite of 'Lords of Discipline' and would be tied up until the studio recording in January. I had however no objection to Tangerine Dream using the theme and was intrigued as to what they would do with it. They saw my theme as having a very special quality of innocence and transcendence which they felt would contrast with the overwhelming evil of the story and this is indeed how they used it - to some considerable effect