This is what I came in to contribute.
I wrote my own, much better ending.
Because cum in your hair was so edgy in the day, and has been pushed back on the overall scale to, oh, Peckinpah’s incredibly gory shoot-outs. 
Not bad!
One. Merryl Streep flashes her boob in one scene. Other that, I’ve got nothing.
Because cum in your hair was so edgy in the day, and has been pushed back on the overall scale to, oh, Peckinpah’s incredibly gory shoot-outs.
(ETA: They had spattering blood, kids.)
As my wife’s all-time most-hated movie, in our household it’s still quite the touchstone. 
JohnT, as you say, the name “Madison” for girls in the U.S. came from the use of the name in the 1984 movie Splash. Note that the name immediately started being used and peaked in popularity in 2001 and 2002. So you can say that the film is indeed now being forgotten, although it lasted longer than you might think in the public imagination. I suspect that most people giving their child that name these days don’t even know that it came from the movie.
I keep wondering where the name “Taylor” for girls in the U.S. came from. It came out of nowhere in 1979 and peaked in popularity in 1994, 1995, and 1996. It’s decreasing in popularity now. As a male name, it goes back to the nineteenth century at least. What happened in about 1978 that suddenly caused parents to start giving their daughters that name? It peaked as a male name in 1993 and is now decreasing quickly in popularity.
Social Security baby name website:
The sound of music (1965) is among the top grossing movies in history, adjusted for inflation. I don’t get the impression that it’s remembered much. The Ten commandments, Doctor Zhivago, Gone with the Wind and Snow White are all as old or older and better remembered.
One problem with the question, if not properly researched, is that asking for films which have largely been forgotten may fail to turn up excellent examples precisely because they’ve been so thoroughly forgotten.
The Michael Keaton Batman movie. I had the tee shirt, the video game, the song on cassingle, the McDonald’s stuff.
Maybe it kicked off a series of 50 more Batman movies and of course set the tone for the genre. But I don’t feel like people think about it as much as any other Batman movies. And I’d think that Toby as Spider-Man is more famous than Keaton as Batman.
I don’t know if I have ever been sufficiently plugged into the zeitgeist to comment accurately, but how about “Romancing the Stone”? I remember it being a fairly big deal, but it seems mostly forgotten.
Are you a big film history buff? Bcause that is the only explanation I can think of where your perspective was skewed to think Dr Zhivago is more culturally relevant today than The Sound of Music.
I remember The Big Chill coming out. The soundtrack triggered a burst of popularity for Motown classics, and made Jennifer Tilly the sexiest woman on screen for a brief period, but I think that’s really the only impact the film had. On the other hand, I still quote Jeff Goldblum’s line “That’s what I like about Nature. It’s one big toilet.” whenever I pee outdoors.
Yes, agree. I can’t think of the last time I heard anyone mention Dr. Zhivago, but remember last year when the Sound of Music musical aired live? Granted, that was based on the musical, not the film, but I think a big part of why Sound of Music hasn’t been forgotten is because of the movie. It still airs every Christmas, and I think most people can hum at least one or two songs from it, even if they aren’t huge fans.
Not too many years after it came out, it was spoofed on SNL (or a similar program) as “the movie where a bunch of yuppies sit around talking about themselves”…The Big Deal.
Although, to give credit where due, TBC is the film in which Kevin Costner gave the best performance of his career.
I suspect the more topical a film is when it’s released, the more likely it’ll be dismissed after time passes. “Easy Rider” comes to my mind.
Eh, the “Silkwood shower” still is a reference one can make. As in “oh god did you see Meryl Streep’s boob? I think my eyes need a Silkwood shower.”
Twister was huge, for a few weeks. Then Independence Day came out.
I remember everyone loved saying Action Jackson and was charmed by Carl Weathers doing the movie promotion. You would think it was going to be the next Lethal Weapon. But all that quickly went away after the public actually saw the movie.
That won an Oscar?!?
It’s one of those movies I wanted to be good so it got more laughs then it deserved thanks to my forcing out the laughs.
Now it looks more dated then 9 to 5 and not nearly as funny.
I blame internet piling on. First for calling it the greatest thing ever, then cutting it a new one for having flaws.
I find most of the winners of best picture to be kind of boring. Maybe for their lack of robots.
Some of the most boring robots in a movie I’ve seen.
The Addams Family & 200 cigarettes
Well, Disney is making 'Avatar-land in their Animal Kingdom. So it will have lasting effects.
Although at this point I bet Disney is wishing they had spent their dollars on ‘Frozen land’.