What do you mean by 'discrete ' prints? I am baffled. I saw LOGAN'S RUN, and A STAR IS BORN (1976) in 70mm as well as SERGEANT PEPPER"S etc in 70mm at the NYC Rivoli on their D150 screen.With AT&T taking ownership of Warner, there will probably be less interest in releasing titles on disc than ever before. Once AT&T really starts managing Warner directly (which usually starts happening a year after acquisition), I fear for both the Warner Archive program and even TCM, since it's not an ad-driven cable station and the only revenue stream is a small fee paid by the MSO's for each subscriber. Let's not forget that AT&T bought Warner primarily to get content for their streaming service - content that will drive people to sign up for the service. A superhero movie or Harry Potter might. "Brothers Grimm" won't, Cinerama or not.
In addition, the disc business is clearly a hit-driven business and most of the business is in recent films. In 2018, the top 100 best-selling Blu-ray discs took about 51% of industry Blu units and almost 64% of the revenue. The 100th best-selling title sold 120,000 units. I suspect that the top 200 discs could have taken 75% of units and over 90% of revenue. And I doubt Brothers Grimm would make the top 200. So the chances of Warner investing a lot of money to restore this title are quite low. Do you think any senior executive at AT&T cares about the history of film?
On a separate note, someone posted way above that they thought Logan's Run was the last 70mm 6-track discrete title, but the 1976 "A Star Is Born", released six months later, also had 70mm discrete prints as did many other films released after that including Tommy, Coming Home, Crossed Swords, Sgt. Pepper's Lonely Hearts Club Band, Comes A Horseman, 1941 and others. Some of those might have also been released in Dolby Baby Boom, but there were also some discrete prints as well. According to my records, the last 70mm discrete title was probably "Spies Like Us" in December of 1985. I remember thinking at the time that they probably didn't want to pay the Dolby licensing fees and IIRC, there wasn't much discrete in the mix anyway.