I watched a documentary about stylized posters and why they don’t show up as much as they used to and its because of focus group testing. A bunch of studios test out these posters on random people and when they show posters like the spiderman one their like 

“The poster is a cartoon that means the movie is a cartoon, im an adult i don’t watch cartoons” 

They prefer the dull poster since it has all the celebrities because their like “hey i recognize that person i like them i will see the movie”

If your interested in the doc its called “ 24X36: A Movie About Movie Posters “ another one i recommend  “ Drew: The Man Behind the Poster”

tldr: posters today are dull cause a lot of people are dumb