"Ultraman: Monster Bible" was an unproduced script by Mamoru Sasaki, a writer for the original 1966 show and the 1990 film "Ultra Q: Legend of the Stars". Not much is currently known except that basically it's about Ancient Astronauts, the Secret of the Universe, and an ancient book that is the key to releasing monsters that will destroy the world. Even the secret of Ultraman could spell defeat of our silver and red hero! This film was to be based on the 1966 series, and with nothing to do with the continuities / series created after it.
Entry written by Rafael C. Gonzalez.
Special thanks to August Ragone for the information, however even he is in the dark on the full details and plot to this project. We'll have more when it becomes available.