Suggestions by @parzivaljoker

Jon Hamm

as Clifford Devoe in The Flash: Rogue Race

Lizzy Caplan

as Sue Dibny in The Flash: Rogue Race

Harvey Guillén

as Trickster in The Flash: Rogue Race

Samara Weaving

as Mirror Master in The Flash: Rogue Race

Brett Gray

as Chester P. Runk in The Flash: Rogue Race

Adam Brody

as Ralph Dibny in The Flash: Rogue Race

Michelle Rodriguez

as Heat Wave in The Flash: Rogue Race

Charlie Hunnam

as Captain Cold in The Flash: Rogue Race

Laura Dern

as Joan Garrick in The Flash: Rogue Race

Jessica Alba

as Iris West in The Flash: Rogue Race

Kyle MacLachlan

as Jay Garrick in The Flash: Rogue Race

Leah Lewis

as Linda Park in The Flash: Rogue Race

Brandon Perea

as Wally West in The Flash: Rogue Race

William Jackson Harper

as Batman in Batman (2019)

Chiwetel Ejiofor

as "Clark's Visitor" in The World's Finest

Spoiler

as "Clark's Visitor" in The World's Finest

Dexter Fletcher

as Director in The World's Finest

Lil Rel Howery

as Ron Troupe in The World's Finest

Bryce Dallas Howard

as Cat Grant in The World's Finest

Rob Delaney

as Steve Lombard in The World's Finest