The official trailer for Batman v Superman: Dawn of Justice was originally supposed to debut today during a 15 minute event at selected Imax cinemas in the US. But, after the trailer was leaked online, Warner Bros. was forced to release it earlier than planned.

Director, Zack Snyder (300 and Watchmen) took to Twitter to reassure fans that they will still be treated with extra, never-before-seen footage at the planned event:

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The movie is set for release in March 2016 and stars Ben Afleck as Batman and sees Henry Cavil reprising his role as Superman. Other stars include Gal Gadot as Wonder Woman, Amy Adams, Diane Lane, Laurence Fishburne, Jesse Eisenberg and Holly Hunter.