Very, very few action movies need to be more than 100min.
I’ve read somewhere that blockbuster movies are trending longer at the moment, because people are ever less willing to pay the high prices for cinema tickets, drinks and snacks, so movie studios need to offer a really big experience to make it seem worthwhile.
I'm honestly surprised that movie theaters have come back to such a degree. I suppose the lesson is that the pandemic didn't really change things all that much--certainly not to the degree a lot of people expected. Even more flexible work arrangements, much less fully remote work, is mostly in some bubbles.
(Although I do have to say Oppenheimer got somewhat tedious in certain parts)
For me, I just get my ticket in advance and show up about 20 minutes late, seems to work out fine.
Anecdotal experience but we (n=2) didn't have the urge to pull out our phones on Oppenheimer (180 minutes).
Movies with a compelling story keep your attention, but with action, your brain can only take so much stimulation. Unless it has a really compelling story, your mind will wander.
ADDED: I originally read sittings as parts but if you mean intermissions, I agree. That's what long movies used to do and it's pretty standard for live plays much over two hours.
All I'd like to add to this conversation is a request to not treat all humans as "the average human" as deduced by any scientific study.
Not to mention an action scene gets really really boring after about 2min. Just more and more of the same. Then add the usual hyperactive editing popular in modern blockbusters and it's like "Yo can you slow down a little? I'd like to actually see a punch happen sometimes"
Also, somehow the art of making dialog audible was lost in the 2010s, to the point where everyone uses subtitles at home now.
Yeah, I don't have the world's greatest hearing but I basically always keep subtitles on. I forget what I was watching a few weeks back but I was basically continuous cranking the volume up so I had a chance of understanding the mumbled dialog and then down when some avalanche of sound threatened to destroy what was left of my hearing.
Your Marvel movie is approaching 3 hours, and no intermission? Fuck that, I'll watch it at home while your CEO whines that no one goes to the movies anymore.
(Wait a minute, Oppenheimer is three hours long? Sorry, ChrisN, but that's one's getting streamed in my living room, too.)
That's a smart decision. Oppenheimer was a good movie (I give it a B+), though very long, and the director (or editor?) gives the audience very few moments to take a breather. I'd have enjoyed it more if I knew I could pause to take a leak or fast forward through the boring part about the affair.
The answers you seek are here: https://en.wikipedia.org/wiki/Cue_mark, specifically https://en.wikipedia.org/wiki/Cue_mark#Use
And the answer to your question, as you now know, is still "no".