Here’s a brief list of albums that, for one reason or another, never got made. If you’re aware of others like them, please add them in the reply section.
A Very Fugs Christmas!
Albert Ayler Digs Cole Porter
Rudolf Serkin: The Complete Piano Music of Francis Poulenc
Sinead O’Connor & the Mormon Tabernacle Choir: “Rock of Ages” and Other Favorite Hymns
Doris Day Sings! Cecil Taylor Swings!
Twelve-Tone Music’s Greatest Hits
David Byrne: The Spotify Special
Pete Seeger: Live at the Republican National Convention
Schubert: “Winterreise” (Luciano Pavarotti, tenor)
Bob Dylan: The “Enough Already” Tour
Stay Tuned... 
Kathleen Battle: Yes She Does
Bugs Bunny’s Opera Showcase
Toscanini’s Adagios
Paganini for Beginners
Mozart’s 1000 Previously Unheard (but sounds familiar) Gems
Castrati Classics
Lassie Comes Home: Coloratura Calls
Wendy working overtime! Good ones.