Even though they didn't make any mention of it at yesterday's press announcement, Samsung shared that there will indeed be a second version of the Galaxy S5 flagship. Just as they have done in the past, they will be launching a version which utilizes their own in-house octa-core Exynos processor running at 2.1GHz.
More than likely the Exynos-based version will only see the inside of South Korean shores (although it is remotely possible we will see a limited international version). We'll keep you updated as more details are revealed.
Source: Engadget