Suggestions by @jeanpaulvalley

Patrick Stewart

as Doctor Hugo Strange in Arkham Asylum : Welcome Home

Hugh Laurie

as Director Jeremiah Arkham in Arkham Asylum : Welcome Home

Nathan Jones

as Aaron Helzinger/Amygdale in Arkham Asylum : Welcome Home

Robert Knepper

as Warren White/The Great White Shark in Arkham Asylum : Welcome Home

Gabriel Luna

as Eduardo/El Flamingo in Arkham Asylum : Welcome Home

John Carroll Lynch

as Lazlo Valentin/Professor Pyg in Arkham Asylum : Welcome Home

Lou Ferrigno

as Cyrus Gold/Solomon Grundy (Voice) in Arkham Asylum : Welcome Home

David Tennant

as Edward Nigma/The Riddler in Arkham Asylum : Welcome Home

Jackie Earle Haley

as Victor Zsasz in Arkham Asylum : Welcome Home

Kelsey Grammer

as Maximilien "Maxi" Zeus in Arkham Asylum : Welcome Home

Tyrese Gibson

as Garfield Lynns/Firefly in Arkham Asylum : Welcome Home

David Harbour

as Thomas Blake/Catman in Arkham Asylum : Welcome Home

Gwendoline Christie

as Doctor Grace Balin/Orca (Voice) in Arkham Asylum : Welcome Home

Sofia Boutella

as Copperhead in Arkham Asylum : Welcome Home

Vin Diesel

as Waylon Jones (Voice) in Arkham Asylum : Welcome Home

Robert Englund

as Doctor Jonathan Crane/Scarecrow in Arkham Asylum : Welcome Home

Mark Strong

as Doctor Victor Fries/Mister Freeze in Arkham Asylum : Welcome Home

Christina Hendricks

as Pamela Isley/Poison Ivy in Arkham Asylum : Welcome Home

Denzel Washington

as Harvey Dent/Two Face in Arkham Asylum : Welcome Home

Margot Robbie

as Doctor Harleen Quinzel/Harley Quinn in Arkham Asylum : Welcome Home