BATMAN ENEMIES

Batman: Long Halloween #13
Two Face
Solomon Grundy
Joker
Mad Hatter
Penguin
Scarecrow
Poison Ivy (plant version)
Catwoman (purple suit)

"Hush Villains"
Hush
Joker
Harley Quinn
Two-Face (also helped Batman)
Scarecrow
Poison Ivy
Clayface
Killer Croc
The Riddler
Jason Todd (According to current continuity)
(Note: These were villians involved in the conspiracy. They did not all fight together in any single given battle.)

BROTHERHOOD OF EVIL

Teen Titans #37
Goldilocks
Warp
Mallah
Brain
Elephant Man
Plasmus
Gemini
Houngan (?)

FEARSOME FIVE

Villains United #5
Shimmer
Mammoth
Psimon
Jinx

MEN OF DEATH

Wonder Woman #1
Dr. Psycho
Cheetah (Barbara Ann Minerva)
Giganta

SECRET SIX

Villains United #1-6
Deadshot
Catman
Scandal
Jade
Parademon
Ragdoll III (son of Peter Merkel)
Possible Permutations
Issue #1: Replace Catman with the Fiddler. He originally had Catman's spot.
Issue #4: Firestorm is released by the Secret Six and fights the Society.
Issue #6: Solomon Grundy is persuaded by Ragdoll to help the Secret 6.

Secret Six #5  
Mad Hatter  
Catman
Scandal
Knockout
Dead Shot
Ragdoll III (son of Peter Merkel)

THE SOCIETY

Villains United #4
Queen Bee
Hive Trooper
Royal Flush Gang
Black Adam

Villains United #1-6
Talia al Ghul
Alex Luthor
Dr. Psycho
Deathstroke
Calculator

Villains United #2
Dr. Polaris
Weather Wizard
Multiplex
Wizard
Black Spider
Brutale
Knockout
Cheetah (Barb Minerva)
Hellhound
Shadow Thief
Crazy Quilt
Killer Frost
Captain Nazi
Hyena

Villains United #3
Knockout
Captain Nazi
Sledge
Weather Wizard
Fatality
Count Vertigo
Killer Frost
Firefly

Villains United #5-6
Scarecrow
Weather Wizard
Deathstroke
Dr. Psycho
Solomon Grundy (who helps the Secret Six at the end)
Humpty Dumpty
Ventriloquist
Atomic Skull
Captain Nazi
Black Adam
Ragdoll I (Peter Merkel)
Mallah
Virtuoso
King Shark
Mr. Terrible
Amazo
Stinger
Amos Fortune
Knockout
Bolt
Mr. Szasz
Giganta
Talia al Ghul