Redeeming those UltraViolet codes that come bundled with Blu-rays and downloading digital copies of your movies isn’t the hopelessly confusing mess it once was. Even so, the studio-backed cloud locker service is still failing to catch on with most consumers. At the very least, it’s not posing much of a threat to Apple and the iTunes Store. But that could eventually change thanks to one of Apple’s familiar foes: Amazon. The Wall Street Journal reports that Amazon is finally considering throwing its hat in the ring and getting behind UltraViolet for digital movie purchases. The online retailer has held talks with Warner Bros. Pictures, Sony Pictures, and Universal Pictures, according to the report.