Suggestions by @jurassictransformers

Aidan Gallagher

as Young Kevin in James Gunn’s Ben 10 (The Final Season)

Ariana Greenblatt

as Young Kai in James Gunn’s Ben 10 (The Final Season)

Isabella Sermon

as Young Gwen in James Gunn’s Ben 10 (The Final Season)

Walker Scobell

as Young Ben in James Gunn’s Ben 10 (The Final Season)

Sofia Boutella

as Frightwig in James Gunn’s Ben 10 (The Final Season)

Doug Jones

as Acid Breath in James Gunn’s Ben 10 (The Final Season)

Kevin Durand

as Thumbskull in James Gunn’s Ben 10 (The Final Season)

Bill Skarsgård

as Zombozo in James Gunn’s Ben 10 (The Final Season)

Benedict Cumberbatch

as Zs’Skayr in James Gunn’s Ben 10 (The Final Season)

Tahar Rahim

as Eon in James Gunn’s Ben 10 (The Final Season)

Will Arnett

as Will Harangue in James Gunn’s Ben 10 (The Final Season)

Melissa Barrera

as Rojo in James Gunn’s Ben 10 (The Final Season)

Dan Stevens

as Fistrick in James Gunn’s Ben 10 (The Final Season)

Peter Dinklage

as Dr. Psychobos in James Gunn’s Ben 10 (The Final Season)

Joe Manganiello

as Kyber The Huntsman in James Gunn’s Ben 10 (The Final Season)

Asher Angel

as Albedo in James Gunn’s Ben 10 (The Final Season)

Wagner Moura

as “He’s Back” in James Gunn’s Ben 10 (The Final Season)

Spoiler

as “He’s Back” in James Gunn’s Ben 10 (The Final Season)

John Malkovich

as Dr. Animo in James Gunn’s Ben 10 (The Final Season)

Matt Smith

as Psyphon in James Gunn’s Ben 10 (The Final Season)