Suggestions by @andmeggyhash

Ryan Potter

as Tim Drake in Superboy and Red Robin

Zendaya

as Daphne in Scooby Apocalypse

Evan Peters

as Fred in Scooby Apocalypse

Sean Giambrone

as Shaggy in Scooby Apocalypse

Shannon Purser

as Velma in Scooby Apocalypse

Katherine McNamara

as Daphne in Scooby Apocalypse

Frank Welker

as Scooby-Doo in Scooby Apocalypse

James Marsden

as Birdman in Future Quest

Jacob Tremblay

as Jonny Quest in Future Quest

Rohan Chand

as Dino Boy in Future Quest

Chris Rankin

as Multi-Man in Future Quest

Ross Butler

as Fluid-Man in Future Quest

Vin Diesel

as Frankenstein, Jr in Future Quest

Chris Hemsworth

as Mighty Mightor in Future Quest

Noah Schnapp

as Buzz Conroy in Future Quest

Finn Wolfhard

as Buzz Conroy in Future Quest

Chris Pine

as Space Ghost in Future Quest

Terry Crews

as Coil-Man in Future Quest

Becky G

as Cobalt in Future Quest

Lana Condor

as Jubilee in Avengers: Conquest of Kang