First DC animated movie to have a post credit scene.
Lois informs Clark that he missed Perry White's big announcement that his son, Keith, had a baby, possibly referring to Keith Robert White, a young black orphan who appeared in the comics during the 90s, and was eventually adopted by Perry White and his wife.
Stana Katic voiced another DC Comics character, Talia al Ghul, in the video game Batman: Arkham City (2011).
Three of the voice actors - Stana Katic, Molly C. Quinn, and Jason Beghe - are, or have been, actors in the TV series Castle (2009).
Matt Bomer played Superman in a series of commercials for the Toyota Prius CW in 2009, and was also considered to play Superman in the canceled Superman: Flyby in the early 2000s and in Man of Steel (2013).