“The Matador” is a comedic adventure about a traveling salesman, Danny Wright (Greg Kinnear), who accidentally meets up with Julian (Pierce Brosnan), “a facilitator of fatalities,” at a Mexico City bar, where their subsequent evening together intertwines their lives in an unexpected, but lasting, bond. Each one is facing what could be a life-changing moment, and though they ostensibly have nothing in common, they’re drawn together.