According to rumors it will have have a huge 5.9-inch 1080p Full HD Display,a new Exynos Octa processor where four Cortex A15 cores clocked at 2.0Ghz and four power-saving Cortex A7 cores clocked at 1.2Ghz and 3 GB of RAM and it will run on Android 4.2 Jelly Bean.
Source : mydrivers.com