unproduced

/ʌnprəˈdust/
adjective
  1. Not created, manufactured, or brought into existence; especially referring to a play, film, or other work that has not been staged or released.
    • The playwright's drawer was full of unproduced scripts.
    • The factory had a large inventory of unproduced parts due to the strike.
    • Her novel remained unproduced as a movie despite several offers.