I really don't care a whole lot what Martin Scorcese or Francis Ford Coppola think about Marvel Universe films. I've never met either gent but come on. You know that deep down inside, most people who create films (or TV shows or comic books or oil paintings or whatever) have a limited capacity to care about films (or TV shows or comic books or oil paintings or whatever) that they didn't create.
Reading those two esteemed filmmakers' views, I sense a lot of "these kids today with their so-called 'music'" in their complaints. They remind me of the adults who in 1964 confidently predicted that the kind of noise the Beatles made then would be gone and forgotten by 1965, '66 at the latest. A teacher I had back at Emerson Junior High School back then would have bet his house that we'd all come to our senses, dump those God-awful rock records and be listening to George Shearing.
And the folks issuing frantic rebuttals to Coppola, Scorcese, et al? They remind me of the folks who write me in anger when I post about not liking cole slaw. So what if I don't? The world would not be so much nicer if we all liked the same things. It would be so much more boring. I suspect that the people who make Marvel or Marvel-type movies can get along just fine without Martin or Francis buying tickets. (Come to think of it, I'll bet it's been a couple of decades since either of those men actually paid to see a movie.)
This is all I'm going to say about this issue. It's about three paragraphs more than anyone should say about this issue.