Unfortunately, Amazon's product page doesn't reveal more information. As the page doesn't have an image either, it's unclear which changes Samsung has made compared to the earlier prototype. Though the CPU hasn't officially been revealed yet, persistent rumours mention a quad-core Exynos 4412 chip with a Mali-T604 MP4 GPU.
Last week, Samsung sent us an invitation that read "Come and meet the next Galaxy". The invite is for the company's Mobile Unpacked 2012 event, taking place May 3 in London. It's likely that the phone will be officially announced during this event.