I can't really answer your questions. I'm just a fan, collector, and poster on message boards dealing with theatre and film music. A guy who owns one of the boutique labels and works for others has been a friend of mine for over 30 years and keeps me informed about recordings that are in the works. He has produced hundreds of recordings, mostly soundtracks of film scores, but occasionally movie musical recordings and OBC recordings too. He knows everything but there are a lot of things he's not allowed to disclose.
For decades Naxos Records released countless re-recordings of classic film scores like Newman's The Hunchback of Notre Dame, Waxman's Rebecca, Steiner's They Died with Their Boots On, Korngold's The Sea Hawk, Herrmann's Jane Eyre, Tiomkin's Red River, and many others. Copland over the years recorded suites from many of his film scores, but never a complete, comprehensive recording of the Our Town and Of Mice and Men scores.
When Naxos announced that CDs of the 2 Copland score were forthcoming, there was a lot of enthusiasm expressed on the various message boards. When the releases were abruptly canceled, there was a lot of disappointment. Individuals with more inside knowledge than I had posted that the Copland estate blocked the releases. I sent a number of e-mails to Naxos but never received an answer. That's really all I know.