THREE QUASI-HISTORICAL PLAYS--WHAT IN MUSIC ARE CALLED " FREE VARIATIONS ON A THEME." (1) Pilate tries to save Christ from crucifixion. (2) MICHELANGELO'S Michelangelo, now the top name in European art, must choose his life's goals--and companions. (3) Young movie-star Gloria gathers the greatest names in movies to her home to hear a great announcement--but sound is heard first. Has been called "a prequel to 'Sunset Boulevard.'"