Comment: That's Adam with director Lian Lunson. I don't know anything else about the lunch or the casting decision.
Despite the presence of Harrison Ford (Indiana Jones and the Kingdom of the Crystal Skull) and Adam Beach (Comanche Moon), I fear Cowboys and Aliens will be stereotypical. I'd be amazed if the Apaches in the story don't come across as deadly savages.
For more on the subject, see Adam Beach to Play Tom Kalmaku? and COWBOYS & ALIENS.