"Guardians of the Galaxy" is a surprising choice for Marvel's next big non-sequel, for a whole host of reasons. It's a massive space-spanning sci-fi tale, for one, and it stars, among other unusual characters, a sentient tree and a gun-toting raccoon. Not exactly the most accessible assortment of heroes on paper, to say the least.

But "Avengers" director Joss Whedon, who is assisting Marvel as a creative adviser on the studio's upcoming slate of films, has all the confidence in the world in "Guardians of the Galaxy." And it all boils down to one reason: James Gunn, the director of "Guardians."

"James is what makes me think it will work," Whedon told MTV News at the Toronto International Film Festival, where he debuted his Shakespeare adaptation "Much Ado About Nothing." "I myself was sort of like, 'Well, I liked Rocket Raccoon as a kid, but I'm not sure how that plays [to a wider audience].' And then they said, 'Well, we're thinking about using James Gunn.' And I said, 'Oh, then no, you're fine.' He is so off the wall, and so crazy, but so smart, such a craftsman and he builds from his heart. He loves the raccoon. Needs the raccoon."

"This is the guy who wrote 'The Specials.' People don't understand how influential that movie was about heroes, about taking heroes and making them mundane," Whedon added. "And [he directed] 'Super.'"

Whedon said that Gunn "has barely started" on the script for "Guardians," but that he already has a take on the film that's sure to set fans on fire.

"He has a very twisted take on it, but it all comes from a real love for the material. It's going to be hard for the humans to keep up," said Whedon. "I know he's going to come from left field and I'm going to go, 'What?' And then, 'Of course, why didn't I think of that?' And then I'm going to beat him!"

Are you excited for "Guardians of the Galaxy" or still skeptical? Tell us in the comments!