DC Comics are known for their villains such as The Joker and Lex Luthor, however some villains are underused and therefore less known. Take Tyrannosaurus Reich, the Nazi Dinosaur for example. He only appeared in one comic but from the looks of things he should have been in more.
T. Reich was pulled to earth through a dimensional portal from a dimension of Nazi dinosaurs. He briefly wreaks havoc in the downtown before being driven back to his home dimension by a housecat which changes sizes when agitated.
If they used him more often I’m sure DC could have made a movie out of him. A cross between Jurrassic Park and Schindler’s List maybe?