director zack snyder has unveiled another glimpse behind the scenes of 2017's justice league, with a photo of ezra miller as the flash gazing at a larger-than-life image of margot robbie as harley quinn.

the filmmaker's caption cryptically refers only to "love at first sight," but it turns out there is context for the photo: photographer clay enos, who worked on watchmen, suicide squad, batman v. superman: dawn of justice and justice league, made a test print of robbie in her suicide squad makeup and costume, and brought it to set.

the photo shared by snyder was purportedly taken on one of the days in which the filmed justice league's third-act battle.

related: warner bros. to shake up dc films in wake of justice league

one of the architects of warner bros.' so-called dc extended universe, snyder directed man of steel, batman v superman and part of justice league, and produced wonder woman. however, he's not expected to return for any additional installments of the dc film franchise. before his work on the dceu, he directed such films as watchmen, 300 and a remake of dawn of the dead.

keep reading: zack snyder's original five-movie dceu arc was "epic, grand, emotional"