Samsung has chosen to unveil its next mobile chipset destined for mid-range smartphones. It's the Exynos 7 Octa 7870, and it's produced "using the company's most advanced 14-nanometer (nm) FinFET process technology", according to the official one-paragraph information on it.
Unfortunately no other details about the Exynos 7870 have been shared by Samsung at this time. Thankfully though, the 7870 has already been caught in a couple of benchmarks while powering the upcoming Galaxy J7 (2016). If the info tabs from those benchmarks aren't lying, then Samsung's newest mid-range SoC features a 1.7 GHz octa-core Cortex-A53 CPU and a Mali-T830 GPU.
The Exynos 7 Octa 7870 is probably meant to be the successor to the Exynos 7580 which has been seen in the first Galaxy J7 phone from last year, for example. Hopefully Samsung will decide to share every single tidbit about the 7870 once the new J7 becomes official.