Who is Halt and Catch Fire star Scoot McNairy playing in Batman v Superman: Dawn of Justice?

Plenty of sites, including Badass Digest, /Film and MovieWeb, think it might be The Flash due to a recent on-set photo (below) leaked on Twitter by Superhero Report. The image came with the message, "Scoot McNairy on the set of BATMAN V SUPERMAN! Look at his legs! Likely post-production related. What could it mean?" Many think the green socks could be replaced by the Scarlet Speedster's super-fast legs.

McNairy joined the film in an unnamed role in late June, leading to early speculation that he might play Barry Allen. This image certainly seems to point in that direction. Of course, it's also possible that in post-production his lower legs will be removed entirely.

However, it's been long rumored that future Justice League members the Flash, Cyborg and Aquaman will appear in Batman v Superman alongside Henry Cavill's Superman, Ben Affleck's Batman and Gal Godot's Wonder Woman.

Directed by Zack Snyder, the film opens March 25, 2016.