5) Blackstar

Forget the fact that He-Man borrowed enough from this earlier Filmation series featuring a shirtless astronaut and his magic sword. But what would really make this project unsellable is Blackstar's shape-shifting sidekick Klone, who possesses one of the most disturbing, um, non-heterosexual sounding voices ever made. Its something you could never reproduce, but definitely couldn't ignore in a revamp—you could never do justice to the bone-grinding tones of the original.

4) Manglor

Very few remember this toy line featuring alien creatures that hatched from eggs and that you supposedly could pull apart and reattach them, but those that do remember that they had no storyline and also didn't work at all. In fact, the consumer report kid's TV show Penny Power did a show about how to get your money back from the manufacturer, Ideal. And a movie about a rip-off would never sell... look at Pirates of the Caribbean 3.

3) Wheeled Warriors

This line of mechanical vehicles didn't include any named characters, so you'd have to build it off the cartoon, which included characters including Jayce, the egomaniacal primadonna who had the show renamed Jayce and the Wheeled Warriors. More importantly, the cartoon not only doesn't make sense, it takes any sense you might already have and runs over it repeatedly beneath the tires of its many goofy vehicles.. Here's an example: one of the minor characters is a plant girl named Flora who is telepathic and can communicate with animals (not plants, as you might assume) also has some robotic alligators as pets and rides around on a flying fish. You just can't film that kind of crazy.

2) ManTech

This line of interchangeably limbed robot warriors (who looked suspiciously like guys in suits) were lame enough that their adventures weren't put out by Marvel or DC comics, but Archie comics, literally the last place you'd look for edgy comics. And while we'll forgo the obvious gay joke here about how a movie called ManTech would fare at the non-adult movie theaters, we will go for the less-obvious one: you really want to see guys swap man parts for two hours?

1) Inhumanoids

Now, this one has everything you want in a summer movie—mechanical suits, mutant trees and a giant monster that kills with a touch. In fact, this kids' cartoon was essentially an kiddie version of the Cthulu mythos...and one that freaked out any kid unlucky enough to watch it. And that's the problem, no one's going to greenlight a movie based on a kid's cartoon that makes Cloverfield look like My Little Pony. Although we wish they would.