Suggestions by @dickcooper

Elliot Knight

as Dove I in Nightwing

Joshua Rush

as Zachary Zatara in Raven

Katy Perry

as Sindella Zatara in Raven

Viola Davis

as Esi jiwé in Beast Boy

Forest Whitaker

as Richard Jiwe in Beast Boy

Jason Momoa

as Mammoth in Beast Boy

Adam Hicks

as Animal Man in Beast Boy

Pete Davidson

as Goodspeed in The Flash

Godspeed

as Goodspeed in The Flash

Tisha Campbell

as Lynn Stewart in The Flash

John Turturro

as Merlin in Raven

Benedict Cumberbatch

as John Zatara in Raven

Katee Sackhoff

as Morgaine le Fay in Raven

Luke Evans

as Doctor Destiny in Raven

Brad Pitt

as Sportsmaster in Nightwing

Ming-Na Wen

as Tigress in Nightwing

Chris Zylka

as Captain Boomerang in Nightwing

Hill Harper

as Marcus Steele in Nightwing

Charlie Sheen

as Anthony Ivo in Nightwing

Evangeline Lilly

as Elena Kitty in Nightwing