Just yesterday costume designs leaked online from Captain America: The First Avenger -- didn't it used to be The First Avenger: Captain America? -- and now, courtesy of Collider, we get a look at similar concept art from Thor.

Oh, sure, it's not nearly as big of a deal as the Captain America art -- after all, Marvel Studios released a shadowy image of star Chris Hemsworth in costume more than a month ago -- but it does show a glowing, but traditional-looking Mjolnir. So no Ultimates-style ax/hammer hybrid, apparently (thankfully?).

However, the images come across as ... less than god-like, don't they? The cape doesn't have the heft of the Hemsworth photo and, from the waist down, Thor's regal attire looks a little like a child's ill-fitting $20 plastic Halloween costume.

Drew McWeeny of HitFix, who's been to the Thor set and viewed Hemsworth's final costume tests, confirms that what we're seeing is the actual design, but cautions that "there are several details about it that are ill-served by those images."

"For one thing, it does not appear to be made of vinyl or plastic when you see the costume in context and in motion," he writes. "I'm surprised by how disco-shiny those photos make him look, because that's not at all what it looks like in the film. There's a real cloth and metal feel to all of the costuming, especially the Asgardian stuff."

"Look, these images weren't meant for public consumption," McWeeny continues. "If you're looking at these and thinking, 'Oh, man, they got him totally wrong,' relax. The world of Thor is big and rich and surprising, and I think once people actually see moving footage, they're going to let go of any minor issues they have with button sizes or color palettes."

Visit Collider to see the second image (in which Hemsworth, strangely, is shown looking a lot like Will Ferrell).

The Kenneth Branaugh-directed film, which stars Hemsworth, Natalie Portman, Idris Elba and Anthony Hopkins, is set to open on May 6, 2011.