Suggestions by @luisperezcozar

Morena Baccarin

as Black Canary in Scooby-Doo! & Justice League Unlimited

Kin Shriner

as Green Arrow in Scooby-Doo! & Justice League Unlimited

Giselle Loren

as Stargirl in Scooby-Doo! & Justice League Unlimited

Phil LaMarr

as Static Shock in Scooby-Doo! & Justice League Unlimited

Phil LaMarr

as S.T.R.I.P.E. in Scooby-Doo! & Justice League Unlimited

Jennifer Hale

as Zatanna in Scooby-Doo! & Justice League Unlimited

Kevin Conroy

as Crimson Avenger in Scooby-Doo! & Justice League Unlimited

Phil LaMarr

as Steel in Scooby-Doo! & Justice League Unlimited

Daniela Bobadilla

as Miss Martian in Scooby-Doo! & Justice League Unlimited

Diane Guerrero

as Green Lantern/Jessica Cruz in Scooby-Doo! & Justice League Unlimited

Michael Ironside

as Darkseid in Scooby-Doo! & Justice League Unlimited

James Remar

as Hawkman in Scooby-Doo! & Justice League Unlimited

Loren Lester

as Nightwing in Scooby-Doo! & Justice League Unlimited

Tara Strong

as Batgirl in Scooby-Doo! & Justice League Unlimited

Nicolle Tom

as Supergirl in Scooby-Doo! & Justice League Unlimited

Bruce Timm

as Producer in Scooby-Doo! & Justice League Unlimited

Sam Liu

as Producer in Scooby-Doo! & Justice League Unlimited

Lolita Ritmanis

as Composer in Scooby-Doo! & Justice League Unlimited

Kristopher Carter

as Composer in Scooby-Doo! & Justice League Unlimited

Michael McCuistion

as Composer in Scooby-Doo! & Justice League Unlimited