New Superman Behind the Scenes Images Provide Fresh Looks at Frank Grillo's Rick Flag Sr., Hawkgirl, Metamorpho, and More Heroes and Villains

With the release of a new behind the scenes video for "Superman Day," we've gotten some fresh new imagery of a bunch of characters from James Gunn's upcoming movie - both hero and villain - including Hawkgirl, Metamorpho, Frank Grillo's Rick Flag Sr., and more.