Looks like a 3rd variant of the Samsung Galaxy S6 will come very soon according to known Twitter leaks guy @evleaks
He had the press images of the Samsung Galaxy S6 Active with light and dark camouflage color versions.
According to GSMArena, this device might have 3,500 mAh battery and some of the key specs of the GS6 like Exynos 7420 processor, 5.1 inch Quad HD Super AMOLED display, 16 MP rear camera with flash and 5 MP selfie camera. Recently, it also got an FCC certification.