The Battlestar Galactica star is listed on IMDb as a character called Henry Ackerdson.
The Facebook page for Zack Snyder's Superman film also claimed that the actor has confirmed his role on Twitter, but the specific tweets cannot be found.
While Ackerdson is not a known DC Comics character, the similarly named Henry Ackerson was the alter ego of Superman villain Metallo in the Justice League: Doom animated movie.
Penikett is also known for his role in Dollhouse and some brief appearances in Smallville. He will be seen next week as Frank Bertinelli's right-hand man in the Huntress-starring episode of Arrow.
Warner Bros' Henry Cavill and Amy Adams-starring Man of Steel will debut on June 14, 2013. Watch the latest trailer below:
Man of Steel on set: