Source: wordpress.com

4. Sleepwalker

(Marvel Comics)

Hey, what if you had to be asleep to be a super hero? Can you see how that would maybe be a bad hook for a comic book? Marvel didn't!

Sleepwalker follows Rick Sheridan, who accidentally merges with a Sleepwalker, a weird dream monster who can move into the real world. The Sleepwalkers’ deal? Whenever Sheridan is asleep, Sleepwalker gets to come out and use his superpowers to fight crime. Shockingly, this concept held down a thirty-three issue solo series.

I mean, it relied pretty heavily on cover appearances by bigger heroes, including Spider-Man, Ghost Rider, and Darkhawk (who barely missed this list). He went away almost completely after that, though, and he’s seldom popped up since. He did appear in the Marvel Team-Up Relaunch, but we're not calling it that known as Avenging Spider-Man.

Why Wasn't He/It Bigger: Look, Sleepwalker was two characters, both of whom failed to connect with audiences. Plus, you have to be asleep to be a superhero is just silly.