Dean Cain rails against James Gunn's recent comments about his new 'Superman,' claiming it 'was a mistake' for the filmmaker to link the iconic hero to the immigrant experience.

James Gunn’s Superman finally opens in wide release today, and the expectations for the film are quite significant. It’s been reported that the movie needs to have a pretty significant box office take in order to be a financial success.

The former Superman takes issue with the director's comments about the new movie being an immigration allegory: "We know Superman is an immigrant — he's a freaking alien."