DC Universe by Alan Moore

Cosmic Boy

Rokk Krinn of Braal

Jor-El

Kryptonian father of Kal-El (Superman)

Brainiac

Silver/Bronze Age DC, Superman villain

Martha Wayne

mother of Bruce Wayne

Lightning Lad

Garth Ranzz of Winath

Hawkman

Katar Hol, Thanagarian

Bizarro

imperfect duplicate of Superman

Robin

Jason Todd

Mr. Mxyzptlk

Superman villain, Silver Age / Modern Age

Grifter

Cole Cash, WildStorm / Image

Pete Ross

from Superman

Vicki Vale

from Batman

Mongul

Mongul I, DC villain

Arisia

Green Lantern of Graxos IV, Sector 2815

The Toyman

Winslow Schott, DC

Abin Sur

Green Lantern of Ungara, Sector 2814

Joe Chill

murderer of Thomas and Martha Wayne

Mogo

Archetrope

Katma Tui

Green Lantern of Korugar, Sector 1417

Tomar-Re

Green Lantern of Xudar, Sector 2813

Alura

Kryptonian mother of Kara Zor-El (Supergirl)

Voodoo

Priscilla Kitaen, WildStorm / Image

Jax-Ur

Kryptonian

Invisible Kid

Lyle Norg of Earth

The Phantom Stranger

DC, supernatural

Mister Majestic

WildStorm / Image, Lord Majestros

Savant

Kenesha, WildStorm / Image

Alice White

wife of Perry White, from Superman

Sodam Yat

Archetrope

Spartan

WildStorm / Image, Hadrian-7

The Prankster

Oswald Loomis

Ladytron

WildStorm / Image, Maxine Manchester

Clayface

Preston Payne, from Batman

Rot Lop Fan

Unspecified

Vartox

no secret identity, Pre-Crisis

The Vigilante

Adrian Chase

Cosmic King

adult imposter, Pre-Crisis Earth-One

Lightning Lord

adult imposter, Pre-Crisis Earth-One

Saturn Queen

adult imposter, Pre-Crisis Earth-One

Superwoman

Kristin Wells