There is actually a big debate about this on Youtube. Marvel's main problem is that they have a different composer creating different themes for the same hero in the same series. Three Iron Man movies, three different composers, three different sets of themes. That makes it much harder to associate music with the character. Now, I agree that most of Marvel's music isn't that great, but I don't think DC and the overrated Hans Zimmer factory is any better. I'd take the Alan Silvestri AVENGERS score and the Patrick Doyle's score for the first THOR, my favorite score of any Marvel movie, over any DCEU movie soundtrack. Henry Jackman's score for CAPTAIN AMERICA: THE WINTER SOLDIER is pretty good too.