After Burger King announced the launch of the "Impossible Whopper" in more than 7,000 locations for a limited time starting August 8, Stephens analyst Will Slabaugh noted that Restaurant Brands (QSR) had announced plans to launch the meatless, vegan burger nationwide by the end of 2019. He has a "high degree of optimism" around the potential for this premium burger and believes it can be a strong driver of increased trial and check for both Burger King and franchise operator Carrols Restaurant (TAST), Slabaugh tells investors. He keeps an Overweight rating on Restaurant Brands shares.