HeatVision has learned talks between producers of Snow White & The Huntsman and Viggo Mortensen have broken down. They say he asked for too much money and profits which has lead him to walk. Viggo was set to play the Huntsman in the film who instead of killing trains Snow White.
I believe the problem might have been the casting of Kristen Stewart in the lead who doesn't have the greatest on set reputation or even the respect of her peers. Whatever the case is Viggo could very well be able to shoot Superman if there is still a role for him. Michael Shannon (Boardwalk Empire) and Edgar Ramirez (Wrath of The Titans, Carlos, Domino) have both been linked to villainous roles. I also wouldn't be surprised to see Charlize Theron leave the production as well as her commitments to Prometheus might keep her busy. There had been talk that there would be two "Alien prequels".