IMO, the title of lead actor should of gone to Rampage Jackson (incredible stamina and tenacity, essential for any action movie star), Ray Stevenson (he had actually full-on military training in lead up to Punisher, War Zone), Brian Thompson (who looks extremely similar to Arnold, and has actually worked with the "Austrian Oak" in Terminator 1!), Roland Kickinger (Arnold's double for 'Salvation..huge, scary and a real mean one. Totally perfect as a tough as nails commando brute) or even Terry Crews (Mostly starring in comedies these days, but hell, with that frame, he should fit easily in any action film). Brody, or Grace, sorry Nimrod, cannot pull off this movie. If you want to make this film real, then sorry, but Brody will be def the first to be torn to shreds. The Pianist can't save you against a horde of invisible lethal Predator hunters.