Supergirl and the Legion of Super-Heroes #23: Facsimile Edition — DC Comics
Issue: #23 B
A 31st century blowout! Supergirl on Krypton? Shadow Lass running for Legion Leader? Plus an ending no one will see coming!
Creators: Mark Waid, Barry Kitson, Mick Gray, Nathan Eyring, Phil Balsman, Harvey Richards, Stephen Wacker, Adam Hughes
Characters: Shrinking Violet, Brainiac 5, Cosmic Boy, Element Lad, Lightning Lass, Saturn Girl, Shadow Lass, Supergirl, Duplicate Girl, Jeyra Entinn, Polar Boy, Lightning Lord, Mon-El