31st Century
Used on 23 entries
Issues
- Booster Gold: Futures End #1
- Smallville Season 11: Continuity #1
- Legion of Super-Heroes #1
- Legion of Super-Heroes #2
- Legion of Super-Heroes #1
- Infinite Frontier #0
- Justice League vs. the Legion of Super-Heroes #1
- Justice League vs. the Legion of Super-Heroes #2
- Infinite Frontier #[nn]
- Justice League vs. the Legion of Super-Heroes #3
- Justice League vs. the Legion of Super-Heroes #4
- Justice League vs. the Legion of Super-Heroes #[nn]
- Green Arrow #3
- Green Arrow #4
- Superman: The Last Days of Lex Luthor #2