Supergirl writer Ana Noguiera has revealed that DCU co-president James Gunn got involved with Superman's appearance in the new DC movie.
"He is protective of Superman," Noguiera confirmed, when asked by Brandon Davis if that was the case. "There is like a couple things in other moments where he was like, 'He wouldn't say that to her.' And I was like, 'Okay cool.' But, mostly we had the same idea."