Any mainstream DC Characters that appeared only in LOSH In The 31st Century?

[Antiyonder]

I figured I'd put up a thread for this since I've done so for The Batman Strikes. Same rules here. I'm looking for DC Comic Mainstream characters that didn't appear in the Legion Of Super Heroes cartoon, but appeared in the comic tie in Legion Of Super Heroes In The 31st Century. So far I got:

- Arm Fall Off Boy appeared in #16
- Booster Gold will appear in #19
- Circe appeared in #7
- Bart Allen/Impulse appeared in #15'
- Lex Luthor appeared in #13
- Lois Lane appeared in #13
- Perry White appeared in #13

Anymore I listed? I don't count new characters who base themselves on mainstream characters, but the actual characters themselves.