The war has begun in Philadelphia and Boston, where the Super Bowl-bound rivals are lightheartedly refusing to sell items from each other’s cities in a sort of “cheesesteak ban heard ‘round the world.” In Boston, one park has banned the sale of cheesesteaks, soft pretzels and any Philadelphia sports paraphernalia. In Philadelphia, Dottie’s Donuts is refusing to make its best-selling Boston cream confection. Instead, they replaced it with something called “The Creamed Boston.”