The Legend of Zelda: A Link Between Worlds is letting you buy and rent dungeon items, both to shake up the gameplay and to make rupees actually matter. You'll still be able to improve your items, though, and a new trailer shows off some of the spiffy upgrades.
Instead of interacting with an obese fairy, this time you'll apparently get upgrades from a giant octopus. The trailer shows upgrades to your bow and magic staffs, making for much more powerful effects that can hit multiple enemies at once. A second trailer puts a spotlight on the music, and eagle-eyed fans have already noticed a nod to Majora's Mask at one point.