Batman / Superman: World's Finest

Firestorm

Ronnie Raymond & Prof. Martin Stein (merged)

Harvey Bullock

Metamorpho

Rex Mason

Black Lightning

Jefferson Pierce

Speedy

Roy Harper

Blue Beetle

Ted Kord

Aqualad

Garth

Mercury

from The Metal Men

Robotman

Cliff Steele, of the Doom Patrol

Platinum

from The Metal Men

Negative Man

Larry Trainor

Lead

from The Metal Men

Gold

from The Metal Men

Iron

from The Metal Men

Tin

from The Metal Men

Will Magnus

creator of the Metal Men

The Toyman

Winslow Schott, DC

Elasti-Girl

Rita Farr

Amazo

android, Justice League villain

Rocky Davis

from Challengers of the Unknown

Ace Morgan

from Challengers of the Unknown

Red Ryan

from Challengers of the Unknown

Prof Haley

from Challengers of the Unknown

Cyborg Superman

Hank Henshaw

Kelex

DC

Sapphire Stagg

girlfriend/wife of Metamorpho

The Chief

Niles Caulder

Simon Stagg

from Metamorpho

The Captain

Billy Batson

Chemo

Metal Men villain

Niles Caulder

DC, Le Chef

T. O. Morrow

DC, creator of Red Tornado

Doctor Cyber

Cylvia Cyber

Magpie

Margaret Pye, DC

Mr. Atom

Captain Marvel foe

Onomatopoeia

from DC

Bertram Larvan

Bug-Eyed Bandit

Boy Thunder

David Sikela

Mekanique

DC, robot villain

Ultivac

Challengers of the Unknown foe

Doc Dread

DC, Java