Production is now underway on James Gunn's Superman, which is set to usher in a new era for DC movies onscreen. While a lot of the specifics surrounding Superman have remained a mystery, Gunn has been sharing a number of fun behind-the-scenes glimpses on social media — including a pretty meta one. On Monday, Gunn shared that Nathan Fillion, who is playing Guy Gardner / Green Lantern in Superman, has been sharing "What Would James Gunn Do?" stickers throughout the film's set.

"So @nathanfillion brought a bunch of stickers he's put all over the Superman set today (including @stefceretti's computer)," Gunn's post reads.