Here is an extended article about Guillermo Del Toro and his many projects. "At the Mountains of Madness" is explored near the end and mention is made of part of the preproduction team (Wayne Barlowe, Peter Konig, Guy Davis and myself are mentioned) Working at Lightstorm with this particular team was an incredible experience and one that taught me a great deal. I was a total newcomer to the preproduction process but rapidly fell in love with the insane schedule and the team environment.
http://www.newyorker.com/reporting/2011/02/07/110207fa_fact_zalewski