I think that when it comes to the highly subjective world of comic book movies, one thing most people can agree on is that good lord that opening scene for Watchmen was amazing. It perfectly captured the rise and fall of the Minute Men, the alternate history of the setting, the coming together of the film's main characters matched with Bob Dylan's The Times They Are A-Changing brought the audience up to speed with everything they needed to know about the world of the film.
Here watch it
One problem: the concept of this opener would've been great for a Namor movie. A few snippets of his life, fighting in WW2, flipping a tank with one hand, fighting the OG Human Torch, meeting Cap, some of his golden age adventures, Atlantis being destroyed, his years as amnesiac hobo etc set to a classic song that evokes change
Pity DC got there first