Superman/Batman #1 (Oct. 2003):
“World’s Finest”
by Jeph Loeb, Ed McGuinness, Dexter Vines

Superman/Batman #1

Title: “World’s Finest”

Medium: comic

Cover date: Oct. 2003

Publisher: DC
Written by: Jeph Loeb
Art by: Ed McGuinness, Dexter Vines

12 characters in this story:

(Click links for info about character
and his/her religious practice, affiliation, etc.)
Pub. #
Superman Superman (Clark Kent)
(lead character)
CBR Scale: S Methodist / Kryptonian religion
Kryptonians; Super Friends...  DC 13,409
Batman Batman (Bruce Wayne)
(lead character)
CBR Scale: ICBR Scale: S Episcopalian / Catholic (lapsed); atheist
Batman family; Quinntets...  DC 11,112
Lex Luthor Lex Luthor villain scientist
CBR Scale: S Episcopalian (lapsed); Nietzschean atheist
Injustice League; Secret Six...  DC 1,508
Captain Atom Captain Atom (Nathaniel Christopher Adam) hero
CBR Scale: U Catholic
Extreme Justice; L.A.W.... 
[major in U.S. Air Force]
DC 259
S.T.A.R. Labs S.T.A.R. Labs supporting character group scientist
  [science lab] DC 98
Jor-El Jor-El
supporting character
CBR Scale: S Kryptonian religion
[father of Kal-El (Superman)]
DC 251
supporting character scientist
CBR Scale: S Kryptonian religion
[biological mother of Kal-El (Superman)]
DC 166
Metallo Metallo (John Corben) villain
CBR Scale: I manifestly non-religious
Injustice League; The Legion of Doom...  DC 125
Major Force Major Force (Clifford Zmeck) hero
  Freedom's Ring; Injustice League...  DC 46
Martha Wayne Martha Wayne
supporting character
CBR Scale: U Catholic
[mother of Batman] DC 59
Dr. Thomas Wayne Dr. Thomas Wayne
supporting character
CBR Scale: U Episcopalian
[Batman's father] DC 75
Joe Chill Joe Chill
  [mugger who murdered parents of Bruce Wayne (Batman)] DC 116

Adaptations of this comic:
Superman/Batman: Public Enemies (2009)