JLA

Krypto

Superboy's Super-Dog

Superboy

Kon-El / Conner Kent

Firestorm

Ronnie Raymond & Prof. Martin Stein (merged)

Mr. Terrific

Michael Holt

Santa Claus

unspecified

Blue Beetle

Ted Kord

Helena Bertinelli

DC, The Huntress

Steel

John Henry Irons

Arsenal

Roy Harper

Impulse

Bart Allen

Courtney Whitmore

Star-Spangled Kid; Stargirl

The Star-Spangled Kid

Sylvester Pemberton

Ace the Bat-Hound

from Batman

Madame Xanadu

DC, supernatural

Atom Smasher

Albert Rothstein

Woozy Winks

sidekick of Plastic Man

Doctor Light

DC, Arthur Light

Sand

Sanderson Hawkins

John Jones

real human, observed by J'Onn J'Onzz

Sentinel

Alan Scott

Neron

DC, Demon

Argent

Toni Monetti, from DC

The Tattooed Man

Abel Tarrant, Green Lantern's villain

Doctor Fate

Hector Hall

King

The Whip's horse

Captain Nazi

Albrecht Krieger

Sebastian Faust

DC

Neal Emerson

DC, Doctor Polaris

Ten of Spades

Melanie Walker, from Batman Beyond