An Update on an entry on my OP original list, Arnold (1974).
I posted an inquiry about this movie over on Scream Factory's FB page and actually got a few responses (but none from Scream Factory's admin). Apparently according to George Reis, Arnold is caught up in some legal tangles with the Bing Crosby estate. Of course I had no idea Bing Crosby had anything to do with this movie but he was still alive when Arnold was released.
Furthermore Mr. Reis mentioned that Scorpion Releasing confirmed this information as they have been releasing other "Cinerama" films for some time. Oh well, another fun film bogged down in rights issues.
Here's hoping Scorpion Releasing can get something done with Arnold along with other Cinerama titles and bring them to Blu-ray. I provided to Scorpion Releasing's web page and here's Scorpion Releasing's FB Page.
So glad Arnold isn't completely forgotten. Would love to see it get a release one day.