A not-so-odd little poll…what’s your favorite movie that was either planned but not filmed, or was entirely made up for a passing mention in -i=another* movie, TV show, book, etc.?
My picks:
Helix, starring Anna Scott. (It’s said to be like “Close Encounters meets Jean de Florette”) Featured in Notting Hill.
And probably DC. vs. Marvel, which according to The Onion will be the summer blockbuster of 2016.
Anyone else?
Good Omens. But hope dies last, or so they say…
Arnold Schwarzeneggar’s “Crusades” movie.
I was thinking about this the other day, but I always got a kick out of “Angels With Filthy Souls” from the first two Home Alone
“I’m gonna give ya, to the count of ten, to get your ugly, yella, no-good keester off my property, Before I pump your guts fulla lead. One, two, ten!”
Disney’s Gremlins from WWII.
The epic theatrical film of Frank Herbert’s Dune mentioned in John Varley’s Titan books (written before 1984).
Don’t forget the sequel, Angels With Even Filthier Souls. 
According to www.comics2film.com, the Darren Aronofsky/Frank Miller Batman movie is finnally dead. My hopes for that movie were higher then a hippie on, um, some day when hippies get really high…
The Lords of Light movie is also sorely missed… Jack Kirby did conceptual sketches…
Blimp: The Hindenburg Story, as referred to in Seinfeld.
Nine Princes in Amber.
It keeps getting talked about, but that’s as far as it gets.
This keeps coming up in different threads… Ridley Scott and Dan O’Bannon went nearly broke trying to film Dune. They only got it half finished, went back to London and filmed Alien as their next project. I’d like to see Dune done by the same people that brought us Alien.
Gumby.
Among the movies that piqued my curiosity:
“See You Next Wednesday” (preferably in Feelaround)
Howard Stern’s “Fartman”
“Chunnel” (Why don’t you just TELL me the name of the movie…?")
The musical remake of “Gone With the Wind” (with Sharon Stone as Scarlett O’Hara) in "Irreconcilable Differences).
Buckaroo Banzai vs The World Crime League
Ghandi II (mentioned in UHF)
There has been quite a few interesting movies mentioned or shown on the marquee on the Simpsons. Can’t think of any offhand other than “Calling all Quakers”
Brian
Aliens vs Preditor
William Gibsons Alien 3(way better script)
Mort (Terry Pratchett book)
Other Simpsons-only movies:
“Too Many Grandmas” starring Bo Derek & Olympia Dukakis
Julia Roberts in “Love Is Nice”
“Honk If You’re Horny”
“Hail to the Chimp”
“Saving Irene Ryan” and “Undercover Nerd,” both starring Rainer Wolfcastle
“Mr. Smith Goes to Washington” as re-made by Mel Gibson
“The Tango of Death”
“The Bloodening”
“The Itchy and Scratchy Movie”
It wasn’t completed, so it may not count: “Radioactive Man”
Regarding the Simpsons, there’s the whole Troy McClure filmography, which can be referenced at various places online. My three favorites:
The President’s Neck is Missing
Cry Yuma
Today We Kill, Tomorrow We Die
Hey, Hey in the Hayloft and Ants in Your Plants of 1939. Oh, and of course the other O Brother, Where Art Thou?
Buckaroo Banzi vs. The World Crime League! How I long to see that one made!
Starship Troopers done right, with powered armor, skydiving from orbit, intellegent bugs, the Skinnys, etc. etc. That would be such a better movie than the crap that got made!
The Hitchhiker’s Guide to the Galaxy, directed by Terry Gilliam, starring Bruce Campbell as Zaphod Beeblebrox.