those are unfair comparisons.

They are franchises, not standalone projects. Much like you are more keen to see a video from a creator you have enjoyed in the past. The barrier to entry is lower.

And the avengers have comic books as well as an excuse to yourself that it's probably worth it to risk putting your time into watching the movie.

Now think of a random movie, I call it 'The study of Protastores' It's a made up name, it has the word study in it. Would you go and watch it if it was 3 hours long? You it would be a difficult pitch, even if it is the best movie ever and has an exciting thumbnail