Suggestions by @prokof228

Curran Walters

as Red Hood in The bat-family

Dylan O'Brien

as Nightwing in The bat-family

Brenton Thwaites

as Nightwing in The bat-family

Christian Bale

as Batman in The bat-family

Ben Affleck

as Batman in The bat-family

Robert Pattinson

as Batman in The bat-family

Channing Tatum

as Batman in The bat-family

Iwan Rheon

as Captain Cold in "The Flash"

Melissa Fumero

as Jesse Quick in "The Flash"

Hartley Sawyer

as Elongated man in "The Flash"

Jerome Flynn

as Heat Wave in "The Flash"

Carlos Valdes

as Vibe in "The Flash"

Danielle Panabaker

as Killer Frost in "The Flash"

Tomer Capone

as Abra Kadabra in "The Flash"

Ryan Reynolds

as Mirror Master in "The Flash"

Wentworth Miller

as Captain Cold in "The Flash"

Gillian Jacobs

as Golden Glider in "The Flash"

Evangeline Lilly

as Joan Garrick in "The Flash"

Tessa Thompson

as XS in "The Flash"

Jake Gyllenhaal

as Weather Wizard in "The Flash"