I'm curious to learn whether any of the original Bat-characters created by Frank Miller in his seminal THE DARK KNIGHT RETURNS book have ever made it to canon (Post-COIE, New52, Rebirth) by being adapted from Earth-31.
And if not, would you, as a Batfan, want them back adapted for the current canon? And if so, how?
In particular:
1. Carrie Kelley (Robin)
2. Ellen Yindel (Police Captain then Commissioner)
3. Dr. Bartholomew Wolper (anti-Batman psychiatrist)
4. Abner (Joker's husky bomb-making henchman)
5. Mutant Leader (PRE-COIE precursor to Bane?)
6. Bruno (Criminal, gun-toting, topless with swastika-pasties, tall, muscular buzz-cut henchwoman)
Would/could any of these memorable characters make their way to Main Earth and how should they be adapted to fit in?