Suggestions by @benjombunud

Tara Strong

as Harley Quinn (DCAMU) in DC Multiverse

Hynden Walch

as Harley Quinn (DCAMU) in DC Multiverse

Margot Robbie

as Harley Quinn (DCEU) in DC Multiverse

Tara Strong

as Harley Quinn (DCAU) in DC Multiverse

Arleen Sorkin

as Harley Quinn (DCAU) in DC Multiverse

Ray Porter

as Darkseid (DCEU) in DC Multiverse

Tony Todd

as Darkseid (DCAMU) in DC Multiverse

Michael Ironside

as Darkseid (DCAU) in DC Multiverse

Kevin Conroy

as Batman (Justice League Action) in DC Multiverse

Jack Nicholson

as The Joker (Burtonverse) in DC Multiverse

Jared Leto

as The Joker (DCEU) in DC Multiverse

Joaquin Phoenix

as The Joker (Jokerverse/Stand-alone Universe) in DC Multiverse

Melissa Benoist

as Supergirl (Arrowverse) in DC Multiverse

Nicola Peltz Beckham

as Supergirl (DCEU) in DC Multiverse

Stephen Amell

as Green Arrow (Arrowverse) in DC Multiverse

Tom Welling

as Superman (Smallville) in DC Multiverse

Will Friedle

as Wade Wilson (Earth-12041) in Avengers: Multiverse

Drake Bell

as Peter Parker (Earth-12041) in Avengers: Multiverse

Travis Willingham

as Thor Odinson (Earth-12041) in Avengers: Multiverse

Rosario Dawson

as Wonder Woman (DCAMU) in DC Multiverse