Matt Damon...?? well, that's okay i guess. but Johnny Depp woulda been a bigger and more intriguing choice for the audience (domestic AND foreign). sides...artistically, depp can't go any worse than The Tourist, right..??
as for Costner and Freeman..the former would be too old for Britt, and the latter, again, too old for the bad guy. Caldera's gotta be a mexican..and badass one, too. that's why the recently oscar nominated Demian Bichir is the perfect choice, i think... Javier Bardem WILL say NO. for he's played big (and memorable) villains much too often already.