Suggestions by @trish_dw

Matthew Gray Gubler

as Riddler in The Suicide Squad

Rory McCann

as Harvey Dent in Arrowverse fancasting

Mark Addy

as Oswald Cobblepot in Arrowverse fancasting

Walton Goggins

as Joker in Arrowverse fancasting

Jon Cryer

as Lex Luthor in Arrowverse fancasting

Rebecca Breeds

as Mera in Arrowverse fancasting

Lucy Fry

as Kara Zor-L in Arrowverse fancasting

Ida Marie Neilsen

as Dr. Harleen Frances Quinzel in Arrowverse fancasting

Rachel Skarsten

as Dr. Harleen Frances Quinzel in Arrowverse fancasting

Alexander Ludwig

as Arthur Curry in Arrowverse fancasting

Travis Fimmel

as Arthur Curry in Arrowverse fancasting

Alex Russell

as Brandon Stark in Robert's Rebellion

Neal McDonough

as Tywin Lannister in Robert's Rebellion

Daisy Head

as Lysa Tully in Robert's Rebellion

Freddie Highmore

as Petyr Baelish in Robert's Rebellion

Andrea Sixtos

as Elia Martell in Robert's Rebellion

Henry Cavill

as Robert Baratheon in Robert's Rebellion

MyAnna Buring

as Rhaella Targaryen in Robert's Rebellion

Josh Brolin

as Bane in What If Marvel Studios actors played Dc characters

Tom Holland

as Dick Grayson in What If Marvel Studios actors played Dc characters