They’re Timeless

One very important thing about comic books is that they’re timeless and, as a result, so are the movies that are based on them.
Superman’s first appearance in a comic was in 1938, Batman’s was 1939, Spider-Man’s was 1962 and Iron Man’s was 1963 – and look at how insanely popular those characters still are today in both comic books and their movies. Heck, Captain America (first appearance 1941) was actually born in 1920 and took part in World War II, yet he is still adaptable in a modern movie. And look at the Watchmen – their comic book was set in an alternate 1980’s, but a great movie was made about them in this millennium nevertheless.
The very nature of these characters makes them always work in a modern setting. Minor details can be altered to make that possible in the trickier cases but, as a general rule, comic book characters will work on screen in any era – and that makes the comic book movie genre effectively immortal.
