For Chobani's first Super Bowl spot, the yogurt brand partnered with ad agency Droga5. Here's an inside look at how the ad came together.The Broncos and the Seahawks won't be the only ones facing off during this weekend's Super Bowl. On Sunday, Oikos and Chobani, two of the country's top Greek yogurt brands, will also be going head to head in an advertising battle that some are calling the "yogurt wars."Of course, Dannon, the multibillion global conglomerate that owns Oikos, has done this all before. This year, it's pulling out all the stops with an ad that features spokesman John Stamos, as well as his Full House castmates Bob Saget and Dave Coulier, which has already led to a slew of pre-Super Bowl enthusiasm about the spot.For Chobani, on the other hand, this is a first.