I've really been on the fence with Calista Flockhart, but I gotta admit Cat Grant was in fine form this episode. I loved the way she shouted for "Miss Teschmacher!" in note-perfect Gene Hackman style.
Some people online are saying this is the Donnerverse, but I disagree. I think, with the nods to so many different and divergent Superman narratives, we're supposed to see this reality as a synthesis of all those stories. So Lex Luthor is both like the villain from SUPERMAN THE MOVIE and like the head of Lex Corp (or Luthor Corp) from the Byrne reboot. There's definitely a pre-Crisis feeling to the way the Supers are kind and cheerful in public and the way they relate to each other on a personal level (almost as brother and sister), but we're clearly in a post-Crisis reality with Cat Grant and the DEO.
You could even say that Superman has taken to sporting those epaulettes on his cape as a tribute to his movie MAN OF STEEL father. Maybe Kara told him a cool story about his father. "Oh yeah, at one family dinner, he was wearing this Kryptonian gladiator outfit with fancy epaulettes on the cape. Uncle Jor-El was always doing crazy stuff like that."