Warner Brothers panel kicked off with a bang! Zack Snyder wasted no time coming on stage even though he wasn't scheduled or announced but we all knew he would be there. He said that filming is going great and that they have "a teeny tiny thing" to show the Hall H crowd! (via Superhero Hype! Live Blog)
Batman (Ben Affleck) is standing on top of a Gotham city rooftop in the rain. He is a still armored Bat suit similar to the one in The Dark Knight Returns. His eyes light up white. He pulls a tarp that reveals the Bat Signal that lights up. And hovering above him is Superman (Henry Cavill) pissed off. Superman shoots out his heat vision. Cut to title card.
Batman v Superman: Dawn of Justice debuts May 2016