There was a time when reports of a new Disney movie coming out meant there would soon be a fresh feature-length cartoon at your local theater, usually at the rate of one a year. But the audience demand was too big for just “Snow White and the Seven Dwarfs” (1937), “Pinocchio” (1940), “Dumbo” (1941), and “Bambi” (1942). By 1950, Disney was also releasing live action features – starting that year with “Treasure Island” – along with the animated ones. “Cinderella” came out in 1950, too. By the time Disney’s feature-length nature films hit the screens, beginning in 1953 with “The Living Desert,” there was no looking back.