Prince was well known in the entertainment industry for having a vast body of works that have never seen the light of day. It has been said that his vault contains over 50 fully produced music videos that have never been released, along with albums and other media. The following is a list, in rough chronological order, of the most prominent of these unreleased works. Many were later released and circulated among collectors as bootlegs.
Before Prince formed The Time, he considered using his backing band as a side-project called The Rebels. The 1979 project was a group effort, with songs being written and sung by the various members (only Bobby Z and Dr. Fink did not sing). André Cymone and Dez Dickerson each contributed material and a few numbers were sung by Gayle Chapman. Instead of making something that sounded similar to his R&B solo output, Prince wanted go into more rock elements of songs such like "I'm Yours" and "Bambi". The project was eventually shelved feeling that the whole thing sounded too generic, but two of the songs composed by Prince were re-recorded and released much later: "If I Love U 2 Night" by Mica Paris (and later by Prince's wife-to-be Mayte Garcia) and "You" (renamed "U") by Paula Abdul. The original Prince guide vocal for "If I Love U 2 Nite" appeared by mistake on the rare Mica Paris Stand for Love EP, of which only a handful exist. From 10–21 July 1979, the band recorded nine tracks together at Mountain Ears Sound Studio, Boulder, CO, USA:
No further sessions under the name "The Rebels" are known to have taken place.
The Second Coming was planned to be a documentary film and live album from Prince's Controversy Tour directed by Chuck Statler, that was shot on the 7 March 1982 concert at Bloomington, Minnesota. The tour was professionally filmed, with a storyline in-between songs, but the project was abandoned, likely due to Prince's schedule producing The Time and Vanity 6. The title comes from a prerecorded a cappella intro to the tour, immediately preceding the song "Uptown".