Yes, even thought it’s best enjoyed at the moment (the bubbles will go flat). Just before guests arrive, you could mix the apple cider, Champagne (or whatever sparkling wine you choose) and Brandy (if you’re using) and store in the fridge. You could prep the glasses with the cinnamon-sugar rim and pour the drinks when your guests arrive. If you want to prep a few hours before guests arrive (and are using the Brandy), just mix the apple cider and brandy (not the Champagne). Refrigerate the mix. Keep the bubbly on ice. Prep the glasses with the cinnamon sugar. When the guests arrive pour the cider/brandy in each glass and add the bubbly. Add the garnish, if you’re using.