Tomorrowland, one of the four segments of ABC's Disneyland, is a new departure for the genius who virtually invented the Mouse. It’s science-factual instead of science fictional; will include live action and cartoons, and will combine the thinking of three of the world’s outstanding space experts: Dr. Wernher von Braun, Dr. Heinz Haber, and Willy Ley. The first program, set for March 9, will deal with the history of flight and man’s conquest of outer space. One hero will be Space Man (Homo Sapiens Extra Terrestrialis) , a character created by the Old Master for TV.