This morning's Nintendo Direct debuted a new trailer for The Legend of Zelda: A Link Between Worlds. Beyond showing some more footage of Link's new abilities and the growing worlds of Hyrule and Lorule, the trailer also debuted a new feature in which players can challenge Shadow Link through StreetPass.
The trailer shows Link approaching an elderly character named Gramps, who informs him that a new Shadow Link from a player tagged with StreetPass. The player then finds Shadow Link in the world and is transported for one-on-one combat. Defeating Shadow Link will yield rupees, with rewards increasing for knocking off higher-level Shadow Links. Nintendo's Bill Trinen also noted during Nintendo Direct that there would be no penalty for losing these battles.
You can watch dueling Link action in the trailer below. The Legend of Zelda: A Link Between Worlds releases on November 22.