Suggestions by @thecrimsonpaw

Corey Burton

as Shockwave in Transformers

Jon Bailey

as Soundwave in Transformers

Bill Fagerbakke

as Bulkhead in Transformers

Brian Tyree Henry

as Megatron in Transformers

Ben Schwartz

as Hot Rod in Transformers

Dylan O'Brien

as Bumblebee in Transformers

Henry Cavill

as Optimus Prime in Transformers

Seth Rogen

as Director in Teenage Mutant Ninja Turtles

Jordan Peele

as "I Think His Name is Stockman..." in Teenage Mutant Ninja Turtles

Baxter Stockman (TMNT)

as "I Think His Name is Stockman..." in Teenage Mutant Ninja Turtles

Spoiler

as "I Think His Name is Stockman..." in Teenage Mutant Ninja Turtles

The Transformers

as Next Project: in Teenage Mutant Ninja Turtles

Brad Garrett

as "Look Out, Earth!" in Teenage Mutant Ninja Turtles

Krang

as "Look Out, Earth!" in Teenage Mutant Ninja Turtles

Spoiler

as "Look Out, Earth!" in Teenage Mutant Ninja Turtles

Noah Schnapp

as "The Other Ninjas..." in Teenage Mutant Ninja Turtles

FAKE

as "The Other Ninjas..." in Teenage Mutant Ninja Turtles

Jack Dylan Grazer

as "The Other Ninjas..." in Teenage Mutant Ninja Turtles

FAKE

as "The Other Ninjas..." in Teenage Mutant Ninja Turtles

Tom Holland

as "The Other Ninjas..." in Teenage Mutant Ninja Turtles