The title seemingly references the Justice League - a superhero team also featuring Batman and Superman - which director Zack Snyder is due bring to the big screen at a later date.

A website for the film has also been created featuring a new logo - a combination of both heroes' insignia.

It will be released on 6 May, 2016.

The movie - seen as a follow up to Snyder's 2013 Man of Steel - features British actor Henry Cavill reprising his role as Superman, with Oscar winner Ben Affleck as the Caped Crusader.

Fast and Furious actress Gal Gadot also stars as Wonder Woman, alongside Amy Adams, Laurence Fishburne and Diane Lane, all of whom return from Man of Steel.

Newcomers to the franchise include Jesse Eisenberg as Lex Luthor, Jeremy Irons as Bruce Wayne's butler Alfred and Holly Hunter in a role newly created for the film.