Teaser Gallery: Panini America Cracks Four Early Boxes of 2016 Spectra Football

Is it the vibrant colors? The low-numbered parallels that can catch you completely by surprise? The thick card stock and the made-for-Optichrome aesthetics? The mystifying memorabilia cards? The autograph roster that pays homage to legends of the past, current superstars and the game's most promising rookies? Indeed, there's probably not one distinct answer to this question: What's the most appealing…