By Colette Bennett But is it time for the classic chain to innovate beyond new versions of its classic sandwich? Restaurant Brand International’s (QSR) – Get Restaurant Brands International Inc Report Burger King clearly has one goal in life: to reinvent the Whopper until the end of time. From a business perspective, this is understandable. Making something consumers like enough to come back for time and time again is a major challenge in the food industry in general, and especially in the fast-paced, constantly evolving fast-food market. But the Whopper also has respectable longevity. Origina…