During today's Batman v Superman: Dawn of Justice panel at the San Diego Comic-Con, director Zack Snyder unveiled a brand-new trailer for his superhero epic. Check out the new Batcave, Lex Luthor and Kryptonite, Robin's suit, and what happens when Superman needs you to get out of your car. Zack Snyder's BATMAN V SUPERMAN: DAWN OF JUSTICE is in theaters March 25, 2016.