In a large pitcher, combine the white wine, pineapple chunks, and sliced jalapeno pepper.
Add the agave nectar and brandy to the pitcher, and stir until the agave nectar is dissolved.
Cover the pitcher with plastic wrap and chill in the refrigerator for at least 1 hour (or up to 8 hours) to allow the flavors to meld together.
Just before serving, stir in the sparkling water to give the sangria some fizz.
In a small bowl mix together the sugar and chili powder. Then take an extra lime slice and moisten the rim of each drinking glass. Dip the rim of the glass into the sugar mixture to rim the glass.
Fill glasses with ice cubes, and pour the Pineapple Jalapeno Sangria over the ice. Garnish each glass with additional limes, pineapple chunks, and jalapeno slices if desired.
Sip, savor, and enjoy the spicy and delicious flavors of this unique Pineapple Jalapeno Sangria!