Scoot McNairy, who is playing an undisclosed role in Batman v Superman: Dawn of Justice, has been spotted several times during on location filming in the past week. What’s most interesting is that he’s been seen in peculiar green leggings. This is no doubt to give him some CGI effects in post-production. But why? Speculation is rampant. Is he the Flash? Does he have some mutating Doomsday feet? Is he in dire need of Lamisil? You decide after looking at these photos from Twitter user Tim Reinman.

Batman v Superman: Dawn of Justice stars Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, and Jesse Eisenberg as Lex Luthor. It opens in theaters March 25, 2016.