The Belco Experiment (2016)
A group of 83 American expatriates who work in a building in Sao Paulo, Brazil, find themselves trapped in their workplace; a voice emits over the speaker system, forcing them through a series of murderous moral decisions.
Director: Greg McLean
Writer: James Gunn
Stars: Michael Rooker, Tony Goldwyn, Josh Brener
currently filming this one, Gunn has been putting pictures of this on his Facebook page