A new Coke Zero ad debuting during the Super Bowl XLIII telecast entitled Mean Troy features Troy Polamalu reprising the part made famous by Steelers legend Mean Joe Greene in a Coca-Cola spot nearly 30 years ago. The Coke Zero ad takes an unexpected twist from the original and the ending will remain a surprise until game time. Heres a sneak peek of the first 12 seconds a few behind-the-scene shots.