Concept artist Sebastian Meyer has done work for films such as X-Men: First Class, Green Lantern, and Star Trek: Into Darkness, among others. As ComicBook.com points out, Meyer recently updated his website's gallery with looks at some early designs for Guardians of the Galaxy.
The images reveal slight alterations to the look of Eson The Searcher, the Celestial seen when The Collector shows the Guardians the history of the Infinity Stones. There's also a look at the different ways the Stone's power might have manifested (above), plus alterations to Cosmo's helmet and designs for a variety of female aliens. Take a look: