I liked those characters in the comics, but the commercials for the shows never grabbed me. Then again, few DC live-action adaptations have.
OTOH, I‘d love to see someone take a stab at The.Legion of Superheroes. Maybe even the Subs. Lots of good enemies to be had, including and especially The Dominators.*
Imagine seeing characters like Wildfire, Lighting Lad, Emerald Empress, Validus, and Starro done with modern effects. Just to name a few...
* if they do this, they should either go with the original blue skin/white dot version as opposed to yellow skin/red dot version- long criticized for mirroring several “Yellow Peril” stereotypes- or create another version that avoids unwelcome RW parallels but still harkens back to their comic aesthetic.