Lost Media you're shocked isn't getting more attention

ok

Apart from the Incredible storyjam, what else is there? I'm aware of there being a website that included abandoned and rejected episode information, as well as oddly specific trivia. As an example, I remember one blurb being about which episode was airing at the time when the first plane hit the Twin Towers on 9/11. Like that level of specific.

It befuddles me that, despite its ambitions, the existence of NDA-locked copies, a script and some audio circulating, and SPAWNING A MEME thanks to a bizarre magazine cover, Out to Lunch just keeps being "also present". I feel that it has to boil down to more than rights issues and NDAs as to why nobody involved wants anything to do with it.

Considering this was in a pre-Muppet Show time where Jim Henson tried multiple Julie Andrews specials and the infamous Land of Gortch to show that he and his folks could appeal to older, hipper audiences, it doesn't surprise me that Out to Lunch was likely one of those attempts. (Given its sheer hiddenness, it might secretly have been Jim's biggest "adult" failure.)
But since this took Sesame Street and The Electric Company, two edutainment kids shows, and stripped away the educational part for hip sketch comedy and topical TV spoofs, CTW was probably reluctant to air it as its slightly more adult nature would've strayed too far from the shows' intents. That, and some of the sketches nail it down to 1974 with dated references that modern kids might not understand.
As this wasn't educational (enough for PBS), this had to be a Henson Associates co-production for ABC, which is rooted into the plot as the characters from both shows take over the ABC News studio. And of course, there's the whole ABC-being-owned-by-Disney thing.

Opinions on OTL are pretty mixed. A writer for Detroit Free Press, while finding the special "charming", also felt that it was for the sake of money. Some other newspapers weren't so kind, feeling that it couldn't be saved even by the Muppets. Joe Hennes's recap for ToughPigs has him in favor of the Sesame bits and criticizing the Electric bits.
OTL may have also been intended as an undercover 5th anniversary special for Sesame Street, given its timing, but alas, it aired the hour after The Year Without a Santa Claus, which has proved time and time again to be a far more popular production. Oops.

If it's also that Sesame Workshop could be embarrassed by the whole thing, the dated-and-not-educational nature and middling reputation might explain part of it. It's not at the Paley Center, and though clips have been screened at Museum of the Moving Image events, Henson is careful to only show clips and not the full, uncut production.

B.O.O.: Bureau of Otherworldly Operations. Don’t get me wrong, it’s gotten more attention this year than it has at any other point, but still. Other unreleased and unfinished Dreamworks films like Larrikins and Me & My Shadow have their own fandoms despite said fan base never seeing the movie.

My guess is that those two movies had a lot of hype behind them, and the films cancellation caused great disappointment, whereas the poster art for B.O.O deterred fans and led them to believe the film would suck, and the movie had a more quiet cancellation compared to the other two.

Mind you, an Incomplete art book and Pitch Bibles were leaked recently, but not many people payed attention to it, to the point they neglected to even put it on the recently found front page area of the lost media wiki whatever it’s called.

Oh that's a good lost media case, that's mysteryception right there!

For me, I feel like someone at least HAS to have made their own wild fanfictions on how the episodes would've played out.

Another one that I'd have to say is probably Spring part 2, an animation that was made for Kickstarter backers of Night In The Woods, but went unreleased afaik, there was also a zine that went out to the folks who worked on the game, as well as a few lucky backers, Because of the limited amount, and the creator of night in the woods being dead, not much is known about either, also, I'm not sure Abt this, but there might've been more animations that went unfinished or unreleased, not sure because of the low amount of info.