Samsung has just announced an enhanced version of its Exynos 5 Octa chipset. Currently the Octa chipset is available only on the I9500 Galaxy S4 (http://www.gsmarena.com/samsung_i9500_galaxy_s4-5125.php) flagship.
The second generation Exynos 5 Octa might be called Exynos Evolved and will be officially presented next week. So far the teaser just says it