I tried searching the archives here but couldn't find anything. I recall one time seeing a detailed list someone had made up that listed all the studios/companies/estates that owned the films riffed on in the history of MST3K. From this list, they whittled down those that were likely to never see DVD release for one reason or another, be it a studio's unwillingness to sell the rights to Rhino or some other reason, such as "out of respect for the dead". I'm sure it was here that I originally saw the post, but I can't find it anymore. If anyone knows where this info is, could you please repost it?