Add the fruit juice, orange juice, and simple syrup to a large pitcher. Stir to mix the ingredients well.
Add the sliced orange, lemon, lime, strawberries, and apples to the pitcher. Stir gently to combine the ingredients.
Cover the pitcher and refrigerate the sangria mocktail punch for at least 2 hours, or preferably overnight, to allow the flavors to meld.
Just before serving, add the club soda, lemon lime soda, or sparkling grape juice to the pitcher, stirring gently to blend the ingredients.
Fill drinking glasses with ice cubes, and pour the sangria mocktail over the ice. Garnish each drink with fresh mint leaves or with sliced citrus fruit, if desired. Serve the sangria mocktails immediately and enjoy!