In a 4-cup measure, add the red wine, mango nectar, and brandy. Stir to combine.
Blend the lime juice, superfine sugar, tequila, Triple Sec, and ice together in a blender until smooth. You may need to add more ice to make is slushy. Moisten the rim of a glass and coat with salt, then pour in the frozen margarita. Pour Sangria into the center of the margarita glass and swirl. Repeat with remaining ingredients and glasses.
Recipe courtesy of The Neelys