Warner Bros is reportedly planning to reveal the "Batman v Superman" trailer on Comic Con 2015 but it seems that the trailer was allegedly leaked online.

Comic Central City has reported that Warner Bros is allegedly going to show the full "Batman v Superman" trailer on this year's San Diego Comic Con on July and it would then be uploaded online for everyone to see soon after.

"Sources say that the Batman vs Superman trailer is going to be shown on Comic Con. That would be the first reveal of the trailer. But don't worry it would be uploaded online soon after, unlike what Marvel did with Age of Ultron" says the report.

However, the trailer may have already been leaked online.

MoviePilot reported that the opening scene from the alleged "Batman v Superman" leaked trailer shows a flashback of all of the destruction to Metropolis at the end of "Man of Steel," while Batman explains in a voice-over that "the world has changed with the arrival of the Kryptonians."

Ben Affleck's Batman is then shown in the Batsuit asking whether or not Superman is going to save mankind or destroy them.

The trailer then reveals the "Batman V Superman" logo as Batman announces, "I'm going to find out."

Meanwhile, new behind the scenes footage of "Batman v Superman" was posted online and the 13 minute video shows the crew filming a lengthy scene showcasing the Batmobile.

Design and Trend reports that "'Batman V Superman: Dawn of Justice' will hit theaters in March 2016 with stars Henry Cavill as Superman, Ben Affleck as Batman, Gal Gadot as Wonder Woman and Jesse Eisenberg as Lex Luthor. Supporting actors that have joined the cast include Ray Fisher (Cyborg), Amy Adams (Lois Lane), Jeremy Irons (Alfred Pennyworth), Laurence Fishburne (Perry White), Diane Lane (Martha Kent), Holly Hunter, Tao Okamoto, Scoot McNairy and Callan Mulvey."