Five story lines leading into Super Bowl XLIX

Will the Patriots finally get their elusive fourth Super Bowl victory in the Bill Belichick era? Or will the Seahawks establish themselves as a "dynasty" with back-to-back championships? Those are two of the story lines heading into this 49th Super Bowl. My story for NBC's national websites.http://www.nbcbayarea.com/news/sports/5-Story-Lines-Super-Bowl-XLIX-Seahawks-Patriots-289338271.html