In another week or so, the Krispy Kreme at Fallsgrove won’t be the only place to get a hot donut fresh off the frying machine. Duck Donuts, a familiar name for those who work in Virginia or vacation at the Outer Banks, is set to make its Maryland debut on Rockville Pike. Duck, named after the North Carolina town where it was founded, has built a loyal following for its cakey donuts with unexpected toppings like bacon, chopped peanuts and maple icing — all of which can be mixed and matched to your tastes. Also on the menu: muffins, yogurt, breakfast sandwiches and coffee. Opening day could be as soon as next week at the Sunshine Square Shopping Center, 1327 Rockville Pike, in the former home of the Entenmann’s Bakery Outlet. From the buzz we hear, the lines are going to be long.