Warner Bros was forced to release the official first teaser trailer of Zack Snyder directed 'Batman v Superman: Dawn of Justice' online after it was leaked late Thursday. The trailer was meant to debut as a special sneak preview in IMAX theatres on Apr. 20. Instead, a trailer filmed using a handheld camera or cellphone was uploaded on internet. The movie stars Ben Affleck, Henry Cavill, Amy Adams, Jesse Eisenberg, Laurence Fishburne, Gal Gadot, Jeremy Irons, Diane Lane and Jason Momoa.