Here's a scan from a Spanish language magazine posted at the official Robert E. Howard boards. I can't read Spanish very well, so I'm not certain that the accompanying article provides much insight about the film, but the photograph is interesting.
I say "interesting," because, like all such photos, it lacks the context necessary to make a proper judgment about it, other than a gut one. And my gut continues to tell me that Jason Momoa might well be a better Conan than I anticipated but that whatever virtues he possesses will likely be wasted on a B-grade sword-and-sorcery movie that has little of Robert E. Howard in it. Much like James Purefoy as Solomon Kane, the 2011 film may well have an actor who could have, in a less compromised production, portrayed something like a genuine Howard character.
I do hope to be proven wrong, however; I simply don't expect I will be.