Bill and Ted's Excellent Adventure
According to Wikipedia, it was slated to be released in 1987, but was shelved for nearly two years due to the bankruptcy of the film's distributor. This is the only "years on the shelf" film that I can think of that was a major commercial success. Any others?

Do You Want to Touch Me? (Oh Yeah)
I am a huge fan of '70s Glam Rock, and will never delete the Gary Glitter songs from my custom-made Glitterati iTunes playlist (unless it stands between me a desirable career opportunity.)

Whoa
I just watched "Young Frankenstein" last Saturday, and remembered how great his performance was (Inspector Kemp kind of looks like Lemmy, don't ya think?) RIP.

Totz Jr. - The film was a financial flop, and critical reception was mixed (and this was back when Jim Carrey was the $20 million golden boy.) It won a Golden Globe, but no major Oscar noms.

Village People biopic
Back in the '90s, there were rumors that the then-hot screenwriting team of Scott Alexander and Larry Karaszewski would be writing a biopic on The Village People (based on a pretty good "Details" article that focused on TVP producer Jacques Morali.) Unfortunately, "Man on the Moon" apparently…

The Good Doctor
Dr. Demento had JR on his radio show back when I was a teenager (he was promoting "Modern Lovers 88"), and that served as my gateway (the Dr. played selections from his then-relatively small body of work.)

Hack
This guy happened to be at the right place at the right time (early '90s "indie film explosion.") When I watched "The Doom Generation" and "Nowhere", the same thought crept into my mind: "How are these films different from the Z-grade T&A movies they used to play on USA Network's 'Up All Night'?"

"Married to the Mob"-era Alec Baldwin.

The Psychedelic Cowboy
I avoided Lee Hazlewood for years due to fawning praise from hipster rock critics (and I didn't think collaborations with Nancy Sinatra would be that compelling), but once I heard "Think I'm Coming Down" in the Season 2 finale of "Eastbound And Down", I was hooked. I'm slowly building up a…

FantasticBastard - I don't remember the pot leaf, but I'm pretty sure that Bush T-shirt was a play on the "M*A*S*H" logo (ironic '70s reference in the '90s, ya know…)

On a related note,
When I imported a burned copy of Mickey Avalon's CD to my iTunes player, it selected the "Mickey One" soundtrack as the cover art.

If his commentary tracks on "The Monkees" DVD set are any indication, the discussions will be cantankerous and pretentious.

I always felt that had Guns N' Roses continued to make music (even with most of the original members intact), they would be aping the styles of the times (i.e., their 1997 album would sound like Korn, their 2002 album would sound like The White Stripes/The Hives, etc.)

Divine
Sorry if he's already been mentioned in the 900-plus posts. On one hand, if he had lived, he would have turned in some additional memorable character parts (male and female), not just with Waters (think of all the '90s indie filmmakers who could put him to good use.) On the other hand, he auditioned for a role…

If You Can't Pan 'Em, Join 'Em!
Maybe now he can do that variety show:

Lyle Lovett, Character Actor
Never listened to his music when he came on the scene in the '80s, but the moment he appeared in "The Player", I became a fan.

Dave Abbruzzese
He was the Steven Adler of Pearl Jam (minus the crippling drug addiction.)
Also, Jason Everman was the Pete Best of the Seattle music scene (kicked out of Nirvana and Soundgarden before they hit it big.)

Yeah, I remember watching that atrocity back in 1993 on VH1, right before they changed their format to Adult Alternative Contemporary/"Music First"-related videos and programs (and 10 years before they decided to return to "Celebreality" trash programming.)

Guns N' Wes
The list is way too long, but the two "artists" that constantly come up in discussions are Guns N' Roses (nobody I know admits to listening to them back in the day, they were a one-album wonder, they should be dismissed as an '80s hair-metal footnote in the music history books, etc.), and Wes Anderson…

Peter Bagge's "Hate"
Sorry if this has been mentioned already, but the original '90s run of "Hate" was eerily accurate, specifically during the two-part "Leonard and the Love Gods" storyline, where Buddy becomes the manipulative, local music biz wannabe that he earlier despised, and when Buddy has a "late '20s crisis"…