Suggestions by @vadim_havard

Brey Noelle

as White Rabbit in Flash

Iddo Goldberg

as Red Tornado in Flash

Iddo Goldberg

as T.O. Morrow in Flash

Oliver Cotton

as Simon Stagg in Flash

Casper Crump

as Vandal Savage in Flash

Chris Gauthier

as Toyman in Flash

Jordan Fisher

as Bart Allen in Flash

John Wesley Shipp

as Jay Garrick in Flash

Troy James

as Rag Doll in Flash

Javicia Leslie

as Ryan Wilder in Flash

Anthony Carrigan

as Metamorpho in Flash

Cory Gruter-Andrew

as Per Degaton in Flash

Robbie Amell

as Firestorm in Flash

Leslie Grace

as Batgirl in Flash

John Barrowman

as Merlyn in Flash

Ryan Handley

as Godspeed in Flash

Karan Oberoi

as Godspeed in Flash

Neil Hopkins

as Sportsmaster in Flash

David Cubitt

as Mark Shaw in Flash

Peter Sarsgaard

as Hector Hammond in Flash