Suggestions by @rockscar

Rory McCann

as King Nereus in Aquaman: Ocean Kingdom

Christoph Waltz

as Nuidis Vulko in Aquaman: Ocean Kingdom

Cosmo Jarvis

as Ocean Master in Aquaman: Ocean Kingdom

Olivia Cooke

as Mera in Aquaman: Ocean Kingdom

Liam Hemsworth

as Aquaman in Aquaman: Ocean Kingdom

Nicholas Galitzine

as Flash Gordon in Pulp Heroes!

Wilson Bethel

as “It Was Me, Barry” in The Flash

Spoiler

as “It Was Me, Barry” in The Flash

Colman Domingo

as “The Martian” in The Flash

Spoiler

as “The Martian” in The Flash

Linda Cardellini

as Nora Allen in The Flash

Sterling K. Brown

as Silas Stone in The Flash

Billy Magnussen

as Heatwave in The Flash

Riz Ahmed

as Captain Cold in The Flash

Colman Domingo

as Det. John Jones in The Flash

Matt Dillon

as Henry Allen in The Flash

Christian Convery

as Wally West in The Flash

Chris Cooper

as Daryl Frye in The Flash

Maya Hawke

as Iris West in The Flash

Patrick Gibson

as Mirror Master in The Flash