Ariana Greenblatt as Ruthye is great. No notes.
Krem could certainly go a number of ways—I was thinking maybe Paul Mescal or Taron Egerton. I think it’d be fun to cast a leading man-type and play against expectations. Maybe even Ryan Gosling if Gunn/Safran could convince him.
I’m still not convinced it’ll be Krem, though. Part of me thinks that Lobo will be appearing in this rather than Superman: Legacy, either as the main antagonist or a side character.
Or maybe they swap Krem with Brainiac so Kara & Ruthye’s stories are more closely tied? I’m losing confidence that he’ll be appearing in Legacy, or at least as the primary villain.