After witnessing the destruction of Metropolis via Wayne tech satellite. Batman instantly realized that the Earth's forces would be no match against the advanced weaponry of another Krytonian invasion or even defend against the one that resides here on Earth should the day come where he go against the people of Earth. Batman quickly investigated ground zero to find any clues for a potential weaknesses of the aliens and to recover Zod's discarded armor before it fell into military possession or worse. After extensive analysis Batman discovered that the armor can withstand extreme heat and impact with no damage to the exterior. Reverse engineering and retro fitting the armor with strange isotope found at other Krytonian battle sites, Batman is now able to defend against or subdue any Krytonian threat.