Suggestions by @santerir

Kal Penn

as David Singh in The Flash: Scarlet Speedster

Joel Edgerton

as George "Digger" Harkness in The Flash: Scarlet Speedster

Claire Holt

as Lisa Snart in The Flash: Scarlet Speedster

Rachel Hilson

as Iris West in The Flash: Scarlet Speedster

Jack Black

as King Bowser Koopa in Mario Brothers (MBCU)

Jack Black

as Main Villain in Scooby Doo (Live Action Reboot)

Mark Strong

as Victor Fries in SDCU

Flynn Barnard

as Seb Cahill in The Book

Sterling K. Brown

as Floyd Lawton in SDCU

Joel Edgerton

as George "Digger" Harkness in SDCU

Cooper Andrews

as Nanaue in SDCU

Jensen Ackles

as Bruce Wayne in SDCU

Jake Gyllenhaal

as Joker in SDCU

Avan Jogia

as Dick Grayson in SDCU

Mahershala Ali

as J'onn J'onzz in SDCU

David Corenswet

as Clark Kent in SDCU

Jessica Green

as Diana Prince in SDCU