In Brief: Perhaps the ultimate cult movie, Richard Elfman's (Danny's big brother) Forbidden Zone (1980) is a clear-cut, love-it-or-hate-it proposition. It is irreverent, iconoclastic, deliberately politically incorrect and utterly self-indulgent. The film was essentially a showcase for the kind of thing the Elfmans had been doing onstage with The Mystic Knights of the Oingo Boingo.…