Suggestions by @vadim_havard

Jeremy Davies

as Doctor Destiny in Flash

Tom Cavanagh

as Reverse Flash in Flash

Rick Dietrich

as Joar Mahkent in Flash

Joel McHale

as Ultra-Humanite in Flash

Noah Centineo

as Atom Smasher in Flash

Jai Courtney

as Captain Boomerang in Flash

David Sobolov

as Gorilla Grodd in Flash

Ezra Miller

as Bizarro Flash in Flash

Melissa Benoist

as Overgirl in Flash

Ben Affleck

as Batman in Flash

Javicia Leslie

as Red Death in Flash

Kristen Wiig

as Cheetah in Flash

Sylvester Stallone

as King Shark in Flash

Daniel Cudmore

as Gridlock in Flash

Mark Sweatman

as Hunk Norvock in Flash

Wentworth Miller

as Captain Cold in Flash

Nicholas Hoult

as Lex Luthor in Flash

Jimmy Jean-Louis

as Amazo in Flash

Ronnie Zappa

as Doctor Psycho in Flash

David F. Sandberg

as Mister Mind in Flash