Boil apple cider and maple syrup in heavy large saucepan over medium-high heat until reduces to 1/2 cup, about 20 minutes. Remove from heat. Mix in half of chopped thyme, half of marjoram and 1 1/2 tsp. lemon peel. Add butter and whisk until melted. Season generously with salt and pepper. Cover and refrigerate until cold, about 2 hours. (Can be prepared 2 days ahead. Keep refrigerated.)
Position rack in lowest third of oven and preheat to 375 degrees. Pat turkey dry with paper towels. Place turkey on rack set in large roasting pan. Slide hand under skin of turkey breast to loosen skin. Rub 1/2 cup maple butter over breast under skin. If stuffing turkey, spoon stuffing into main cavity. Rub 1/4 cup maple butter over outside of turkey. Reserve remaining maple butter for gravy. Tie legs together loosely to hold shape of turkey. Arrange onion, celery, carrot and reserved turkey neck and giblets around turkey in pan. Sprinkle vegetables with remaining 1 T. thyme and remaining 1 T. marjoram. Pour 2 cups broth into pan.
Roast turkey 30 minutes. Reduce oven temperature to 350 degrees. Cover entire turkey loosely with heavy-duty foil and roast until meat inserted into thickest part of thigh registers 180 degrees or until juices run clear when thickest part of thigh is pierced with skewer. Baste occasionally with pan juices, about 2 hours 25 minutes for unstuffed turkey or 2 hours 55 minutes for stuffed turkey. Transfer turkey to platter. Tent turkey with aluminum foil and let stand 30 minutes; reserve mixture in pan for gravy.
Strain pan juices into large measuring cup, pressing on solids with back of spoon. Spoon fat from pan juices. Add enough chicken broth to pan juices to measure 3 cups. Transfer liquid to heavy medium saucepan and bring to boil. Mix 3 T. reserved maple butter and flour in small bowl to form smooth paste. Whisk paste into broth mixture. Add chopped fresh thyme and bay leaf. Boil until reduces to sauce consistency, whisking occasionally, about 10 minutes. Mix in apple brandy, if desired. Season gravy to taste with salt and pepper. Brush turkey with any remaining maple butter and serve with gravy.