Suggestions by @dickcooper

Jensen Ackles

as Batman in The Flash

Kevin Hart

as Kanja ro in Starfire

Kristen Wiig

as Silver Banshee in Starfire

Donald Glover

as Karras in Starfire

Daniel Kaluuya

as Phy'zzon in Starfire

Diane Keaton

as Martha Kent in Starfire

Kurt Russell

as Jonathan Kent in Starfire

Marlon Wayans

as Johnny Burns in Nightwing

Lauren Tom

as Lillian Worth in Nightwing

Mayko Nguyen

as Adeline Wilson in Nightwing

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