Source: marvel.wikia.com

5. The Eternals

Whom? Exactly. The Eternals are the only thing Jack Kirby created that was boring. Like, if there were nothing interesting about the New Gods, the Eternals were a race of immortal beings who were most notable for putting me to sleep.

Gilgamesh made it onto the Avengers, though. And when the most successful character from your team is the one nicknamed The Forgotten One, you have a problem.

Why They’ll Never Appear: This one is two-fold. First, they’re deeply boring. The Jack Kirby series is boring, the Neil Gaiman series is boring, they’re all boring. And trying to make a movie or TV show out of them would end in disaster. The second reason is that Marvel just blew an obscene amount of money on a TV show about the Inhumans, a similar group of weird, vaguely fantasy-based superhumans who were actuallyway more interesting.

If you can’t make The Inhumans interesting, good luck with the Eternals.