Batman v Superman
Ben Affleck's Batman, Henry Cavill's Superman and Gal Gadot's Wonder Woman.Warner Bros

The debut trailer for Batman v Superman: Dawn of Justice will be attached to The Hobbit: The Battle of the Five Armies, according to reports.

In another blow to Superman, who doesn't even get top-billing in the follow-up to his own 2013 film Man of Steel, the trailer is also said to be "Batman heavy".

Batman On Film are the ones claiming the news, citing insiders who say the first teaser is complete and ready to debut later this year. They then theorise that because both films are from Warner Bros' properties, it could be attached to Peter Jackson's fantasy epic when it's released in the US on 17 December.

If the teaser is released then it would be very early, some 16 months before the film's March 2016 release date.

However, enough footage was ready earlier this year that Warner Bros (WB) could show off a brief teaser at Comic Con, so there's no reason to suspect a finished trailer might not be feasible.

The trailer being Batman heavy makes sense too considering the enormity of that character's popularity and the substantial online buzz anything Batman-related causes. As Batman On Film also state, WB may be angling to take some of the wind out of the sails of Marvel's Avengers: Age of Ultron, which released its first trailer yesterday.

Last week Warner Bros announced nine new films, detailing their entire slate of superhero movies through until at least 2020.

Batman v Superman: Dawn of Justice stars Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Jesse Eisenberg as Lex Luthor, Jeremy Irons as Alfred Pennyworth, Amy Adams as Lois Lane, Laurence Fishburne as Perry White and Diane Lane as Martha Kent.

Directed by Zack Snyder, the film will be released on 25 March 2016.