If you've ever wondered what the universe's oldest U.N. would look like can wonder no more. Comic Book Movie has some concept art for the film Green Lantern that features the home planet of the Guardians called "Oa."
Michele (Star Trek 2009) managed to make it look old and worn and, at the same time, vibrant and alive. This should be an amazing scene. The almost accidental inclusion of the green in the skyline glow and various crystals really makes it pop. The blast of energy from the Central Power Battery, which gives all the Lanterns their power, is striking.
Grant Majors describes the inspiration for the design this way.
"Oa, of course, is at the center of the Universe, and is also an extremely old place. It's been around since not too long after the Big Bang, I assume. And with its function as a sort of U.N.-cum-military-compound in the middle of space, you'd imagine that with 3,600 different sectors, it must have a lot of influence on a lot of different cultures and time. So what I've tried to do is to introduce a plethora of different types of architectural styles and a feeling that, over the millennia, that it's just been building on and building on [itself], and there's just this huge history of culture that's been there."Green Lantern opens June 14, 2011
"I looked to the comics, of course [for design concepts for Oa]. I also wanted to give it a sort of broader aspect. I really wanted to make it the sort of place where, just from the glimpse that we have of it, that you'd really want to go back there and have a really big look around, and in the interest of the film, maybe give birth to subsequent films."
Source: Comic Book Movie