Happens in music all the time. Wendy Carlos recycled the rejected cue she'd written for the "Light Cycles" scene in TRON into a movement for her Moonscapes suite. Bach took the prelude from his E-Flat Major Partita for unaccompanied violin, transposed it down a full tone, transcribed it for organ, and added parts for trumpets, oboes, strings, and timpani; the result became the Sinfonia in his Cantata No. 29 ("We Thank Thee, God, We Thank Thee").Oh, sure. I didn't mean to suggest that that habit was unique to Christopher. He was just the first example that sprung to mind because he's talked about it a fair amount.
But to return to the topic, Johnny Carson came up with the perfect title for a low-budget science fiction project, decades ago: Star Dreck.