Many of the movies in the theaters today are video interpretations of the original comic books. Marvel Comics even has a movie studio operation.
Another indication of the fall of Hollywood writers. Seems like there are no original scripts any more.
I was never a big fan of comics much except Superman and Classics Illustrated. Did many a book report in school reading CI.
Me too, I only tried it once and the teacher seemed to know immediately that I did not read the book. (Using CI for a school report.)
But I grew up reading all comics. I had a collection that would have been valuable except that I read them all many times.
I liked Dr Strange, Challengers of the Unknown, Action, Tarzan, Turok, you get the idea.
Now the movies have enough special effects to do the comics justice, so I watch them as well.
Bill Maher may have his opinion, but a lot of people are not with him on this.
Oh, and as far as being great literature, they do use proper English in comics, and in other languages they strive to use good structure and grammer in their languages too, because governments realize that comics may be the first and in some cases the only texts that children get to read. May as will make them good texts.