Saying [Batman v. Superman: Dawn of Justice](movie:711870) is one of the most anticipated superhero films is an understatement, it is one of the most anticipated Movies of all time! So details are kept in wraps by the WB publicity machine.
In fact, there have been rumors that security is so tight on the set of Batman v Superman: Dawn of Justice that Ben Affleck (Batman), Henry Cavill (Superman), and Gal Gadot ( [Wonder Woman](movie:45787)) all have to wear big black robes when they’re on set and not filming a scene.
But Zach Snyder has the flair for visuals and he knows how to have fun even in tense situations. After a internet breaking Sad Batman photo that he tweeted out, Snyder is up to his tricks again. It appears that they took a photo of Cavill in one of those robes and then decided to have a little fun in Photoshop and turn it into a Star Wars themed shoot!
While it is awesomeness in itself, he is clearly wearing the Superman suit underneath. But if you notice the 'S symbol' and the yellow background, it appears to be actually the [Man of Steel](movie:15593) suit and not the tweaked brighter suit that they released earlier. So maybe Supes changes the costume in this movie. Maybe even the red underpants....................... (Just kidding , keep that way!)
Also most importantly, although the film is most likely to be serious and moody the film makers are having fun!