Rumor has it that Samsung is working on a new chipset that's based on ARM's “Ananke” cores and that the chipset is going to be ready for sampling next year, possibly around the same time Samsung is expected to unveil the Galaxy S7 and even its highly anticipated foldable smartphone. ARM's “Ananke” cores were mentioned in an alleged roadmap for ARM's upcoming Cortex-A cores, the roadmap mentioned that the company will have five CPU cores for all segments of the market and that their codenames would come from Greek mythology with Ananke being one of the cores that replaces part of the A53 and 32-bit A17 segments.
Ananke is said to be designed with the big.LITTLE architecture for the entry to mid-range market which means that it's unlikely we'll ever see it in a flagship device. According to rumors Samsung's new SoC based on Ananke is going to be built on the 10nm process, this will theoretically ensure improved power efficiency with greater performance. Given that all of this information comes from an unofficial source it would be best to take it with a grain of salt until some concrete evidence comes up.