Marvel's 5 next superheroes

Unlike rival D.C. Comics,'s characters, Marvel's characters are often monstrous (Incredible Hulk) with overly extravagant costumes (Iron Man) that can raise a movie's budget into the stratosphere.

"Most Marvel characters have an over-the-top look with kind of bizarre costumes," said Fishler. "If you did Marvel characters cheaply, it would look hokey. It requires a big budget to make them look real."

That may make a character like Iron Fist attractive to Disney. By summoning his inner chi, Daniel Rand becomes Iron Fist, a superhuman hand-to-hand fighter. Trained by aliens, Iron Fist decided to use his powers as a 'hero for hire' like Luke Cage.

It's not that Iron Fist's costume isn't extravagant, but since the character is a martial arts expert, that could cut back on expensive explosions and out-of-this-world special effects.

NEXT: Morbius