The music incorporates fragments of Debussy's unfinished opera.

Neumann had previously written the libretto for Schubert's unfinished opera, Shakuntala.

His sudden death at 54 left the opera not only unfinished but hopelessly disorganized.

Borodin began to write his Prince Igor but he left the opera unfinished at the time of his death nearly twenty years later.

Gunlöd, unfinished opera in three acts (1869-1874) after the Edda (1906)

Za Bakdaz (2007) - posthumous compilation of an "unfinished opera"

When he died he left unfinished an opera based on the life of Milarepa.

There was also an unfinished opera, "A Computer Marriage."

Earlier, they had directed a film version of his unfinished opera Moses und Aron.

The Met finally catches up with Schoenberg's powerful unfinished opera of the 1930's.