No ... but it almost was.
While shooting is underway on Green Lantern, there's still no shots of Ryan Reynolds in the official Corps uniform. Now, though, thanks to the ever-watchful eyes of ComicBookMovie.com, we have a pretty good idea of what the costume doesn't look like.
Jason Palmer, a comic book artist who specializes in paintings of licensed properties, posted to his Deviant Art account that he was working on production designs for two DC Comics films. "One has a scar," he writes, "and one has a ring." It doesn't take a 12th level intellect to know that he's talking about the upcoming Jonah Hex and, more obviously given the latest image, Green Lantern.
Palmer points out that the art he's uploaded is specifically not the costume design for the film, but instead is his own take of Reynolds in the classic Hal Jordan costume.