Writer Steven Pressfield mentions "King Kong Lives" as a live-changing, validating failure in his book 'The War of Art: Break Through the Blocks and Win Your Inner Creative Battles.' This was his first professional writing job after 17 years of trying. After the movie bombed, he realized he had become a professional. He hadn't yet had a success, but "had had a real failure."
According to the book "Creating the Filmation Generation", Dino De Laurentiis approached Lou Scheimer of Filmation to develop an animated spin-off starring the son of Kong. Robert Lamb came up with some pretty wild ideas involving "Kid Kong" being able to change his size at will and travel to various different planets, as well as underwater in a submarine bade out of giant coconuts and bamboo called the 'Coco-Nautilis'. Needless to say, "Kid Kong" never got off the ground.