Suggestions by @vincentwilliamsiii

Lucius Fox

as Lucius Fox in Batman II (Batman & Robin)

Robin (Dick Grayson)

as Dick Grayson in Batman II (Batman & Robin)

Batman

as Bruce Wayne in Batman II (Batman & Robin)

The Penguin (Oswald Cobblepot)

as Oswald Cobblepot in Batman II (Batman & Robin)

Ventriloquist and Scarface

as Scarface in Batman II (Batman & Robin)

Jackal (William Walsh)

as William Walsh in Deathstroke I

Wintergreen

as William Randolph Wintergreen in Deathstroke I

Green Arrow (Oliver Queen)

as Oliver Queen in Deathstroke I

Deathstroke (Slade Wilson)

as Slade Wilson in Deathstroke I

John Lynch (DC)

as John Lynch in Deathstroke I

Adeline Kane

as Adeline Kane in Deathstroke I

Superman

as Kal-El/Clark Kent in Superman II (Superman/Batman)

Billy Batson

as Billy Batson in Superman II (Superman/Batman)

Supergirl (Kara Zor-El)

as Kara Zor-El/Kara Danvers in Superman II (Superman/Batman)

Batman

as Bruce Wayne in Superman II (Superman/Batman)

Robin (Dick Grayson)

as Dick Grayson in Superman II (Superman/Batman)

Robotman (Cliff Steele)

as Cliff Steele in Superman II (Superman/Batman)

Riddler (Edward Nygma)

as Edward Nygma in Superman II (Superman/Batman)

The Flash

as Barry Allen in Superman II (Superman/Batman)

Kid Flash (Wally West)

as Wally West in Superman II (Superman/Batman)