Combine water and sugar in a saucepan and bring to a boil over medium-high heat. Reduce heat to low and simmer until sugar dissolves, about 3-4 minutes. Cool completely.
In a pitcher or glass bowl, combine wine, rum, and fruit. Gently muddle the fruit into the alcohol by pressing and stirring with a large spoon. Stir in the simple syrup (and mint if desired), cover tightly with plastic wrap and refrigerate until chilled, at least 1-2 hours. Before serving, stir in the lime soda. Serve over ice if you wish. Cheers!