Zack Snyder, the director of Batman vs Superman (2015) tweeted about the confirmation of the special teaser in special iMax screenings on 20th April. However a camcorder rip of the movie trailer has already been leaked online.
— ZackSnyder (@ZackSnyder) April 16, 2015
The trailer seems to be filmed with a phone camera, and is blurry, but it does reveal some good information about the plots and also some nice dialogs. Batman “Do you bleed?” the Dark Knight asks the Man of Steel. “You will”. We will have to wait till April 20th to see the actual trailer.