What's more frustrating than knowing about a song by your favourite band that'll probably never be heard by the general public? We Oasis fans know the drill, DIV sessions, AA album, etc, and were very lucky to have the Mustique demos out in a month. This thread is devoted to cataloging all of the hyped unheard material by bands that fans are absolutely dying to hear, but probably won't for a long time. Here are some I can think of:

The Beatles - Carnival of Light: What better song to start a list of musical holy grails with? Though there's quite a bit of unreleased tracks in the Beatles vaults (Quarrymen rehearsals, home demos of Eleanor Rigby, In My Life, When I'm Sixty Four, Good Night, Helter Skelter take 2 unedited, Beatles version of Now and Then), an incredible amount of hype has built itself around this 13 minute avant garde song recorded during sessions for Penny Lane. Though it's probably just another Revolution 9 piece and nothing special (it was even dismissed by George Martin!), I'd still love to hear this song! You probably already know the story, but I'll say it anyway for the benefit of those who don't. COL was almost released on Anthology 2, but George Harrison vetoed its inclusion because of his distaste for avant garde. Bizarre opinion for the man who released Electronic Sound to have. The song has been described by various people, including Mark Lewisohn, and allegedly resembles Frank Zappa's The Return of the Son of Monster Magnet.

Beastie Boys - The Jerry Lewis: This song was recorded during sessions for the Beasties's masterpiece Paul's Boutique, but ultimately left off the album. It remained forgotten about until a tape containing work-in-progress versions of Paul's Boutique songs as well as The Jerry Lewis was discovered and brought to public attention by two Rolling Stone journalists in an article ( www.rollingstone.com/music/features/the-jerry-lewis-the-untold-story-of-the-beastie-boys-single-that-never-was-20140807 ). Most intriguing about the song is that it is apparently extremely catchy, and if released as a single, might have been a global hit. This proved to be the song's undoing though; it was deliberately left off Paul's Boutique to present the album as more "arty" and subvert the image of the Beasties as a bunch of frat boys trying to do hip hop. Luckily for them Capitol execs never heard the song, otherwise corporate meddling might've forced them to include it!

The Verve - Snakeskin: This is a song that was apparently recorded in 1992 during sessions for She's a Superstar. It was apparently inspired by The Rolling Stones's unreleased but heavily bootlegged song Schoolboy Blues (aka Cocksucker Blues). Only five 7'' vinyls were pressed, one for each band member and one for Hut Records staff David Halliwell. Halliwell then gave his copy to Brian Cannon. Cannon put the vinyl up for sale on eBay and tried to arrange a raffle among members of a Verve fan forum, but they weren't able to drum up enough interest, so Brian kept the vinyl. Understandably, Verve fans went crazy over what could be a lost gem from the early, psychedelic days of The Verve, but Brian later clarified that it was "very bizarre, about 45 seconds long cut with Richard's voice from some interview or other and Sobbo leaving an answer machine message," and not a proper song like most assumed. Unfortunately it doesn't seem like anything of interest, and probably why it didn't make the ASIH reissue.

Coldplay - Car Kids: This song first appeared on a whiteboard of titles of songs the band was working on during the Mylo Xyloto sessions before that album's release. The title phrase also features in the album artwork, and shares a name with a rebel group in the MX comics released to tie in with the album. Why so much hype has collected around this song title I don't know, but it probably has something to do with the fact that there was only one b-side released during that era, and that nearly every unreleased Coldplay song heard by the public in some way or another is light-years away from the trash on their last album.

Bruce Springsteen - The Electric Nebraska sessions: The Nebraska album that we all know and love were originally intended as demos, and were recorded alongside some songs that would make Born in the USA. The Boss would later attempt the Nebraska songs with a full band, but eventually preferred to release the demos instead because their raw state exposed the bleak and haunting tunes that they really were. The only songs from the Electric Nebraska sessions released (officially or unofficially) formed the backbone of Born in the USA (the title track, Downbound Train, Working on the Highway, Pink Cadillac). E Street Band members have said that these full band versions were great and rockin' (as evidenced by the full band Atlantic City played live by Bruce), but they concur with his decision to release the Nebraska demos.

Aphex Twin - Q-Chastic EP: There should be little doubt that Richard has thousands of unreleased songs (as evidenced by his Soundcloud dump) lying around on cassette tapes in his bank house. I chose to highlight this EP in particular because it has accumulated a large bounty on what.cd ha ha! Anyway, this EP was slated for release in 1992, but was cancelled for reasons unknown. Test pressings do exist, but good luck getting your hands on them! Apparently the song CAT 002, released on the compilation The Philosophy of Sound and Machine under the alias Q-Chastic was not part of the EP.

Blur - B-Roads: Not music but rather a documentary showcasing the band's Seaside Tour in support of The Great Escape. It was apparently shelved because of the bad vibes captured on film, as the band was falling apart after the media decided that Oasis were the ultimate winners of the Battle of Britpop after the success of WTSMG. Several fans own copies of the film, and all that have claimed to have seen it have said that it is nowhere near as good as Starshaped, a similar documentary filmed during the Modern Life Is Rubbish era. The handful of well-connected fans who own copies have promised not to leak it, so the film remains unreleased. However, a scene-by-scene symposis was published in the fan biography Black Book.

So what other holy grails do you know about? Share them in this thread, and let's all be good members of society so that these treasures may finally see the light of day.