Build the Base: Add the simple syrup, Grand Marnier, brandy, orange slices, pear slices, pomegranate seeds, and cinnamon sticks to a large pitcher and stir until everything is evenly combined.
2 tablespoons simple syrup, ¼ cup Grand Marnier, ¼ cup brandy, 1 orange, 1 pear, ½ cup pomegranate seeds, 2 cinnamon sticks