Now, with the looming threat of Steppenwolf and his winged Parademons — hinted at in the Knightmare sequence of Dawn of Justice — Wayne knows that he needs something a little more intense, a little more protective.
Batman (Ben Affleck) learned, going up against Superman in Batman v Superman: Dawn of Justice, that there are far more powerful beings out there in the universe.
He concocts the Tactical suit, which offers more durable protection but makes the Bat more flexible, for proper fighting techniques.
So he constructed that badass Frank Miller-inspired armor, and equipped himself with some of Lex Luthor’s kryptonite, and took down the last son of Krypton.
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Batman v Superman: Dawn of Justice Ultimate Edition - Nightmare Scene ( injustice )