Suggestions by @mastercasting

White Golden Retriever

as Krypto in A Movie About Superman That Doesn't Have Superman In The Title

Henry Cavill

as Krypto in A Movie About Superman That Doesn't Have Superman In The Title

Dog

as Mammoth Mutt in A Movie About Superman That Doesn't Have Superman In The Title

F. Murray Abraham

as Mammoth Mutt in A Movie About Superman That Doesn't Have Superman In The Title

Dog

as Tusky Husky in A Movie About Superman That Doesn't Have Superman In The Title

Brad William Henke

as Tusky Husky in A Movie About Superman That Doesn't Have Superman In The Title

Dog

as Paw Pooch in A Movie About Superman That Doesn't Have Superman In The Title

Keith David

as Paw Pooch in A Movie About Superman That Doesn't Have Superman In The Title

Dog

as Hot Dog in A Movie About Superman That Doesn't Have Superman In The Title

Danny McBride

as Hot Dog in A Movie About Superman That Doesn't Have Superman In The Title

Dog

as Tall Terrier in A Movie About Superman That Doesn't Have Superman In The Title

Keanu Reeves

as Tall Terrier in A Movie About Superman That Doesn't Have Superman In The Title

Dog

as Chameleon Collie in A Movie About Superman That Doesn't Have Superman In The Title

Abigail Cowen

as Chameleon Collie in A Movie About Superman That Doesn't Have Superman In The Title

Philip Noah Schwarz

as Erik Drekken in A Movie About Superman That Doesn't Have Superman In The Title

Brendon Urie

as Phantom King in A Movie About Superman That Doesn't Have Superman In The Title

Julian McMahon

as H'el in A Movie About Superman That Doesn't Have Superman In The Title

Christian Kane

as Nimrod The Hunter in A Movie About Superman That Doesn't Have Superman In The Title

Alistair Petrie

as Lord Helspont in A Movie About Superman That Doesn't Have Superman In The Title

Kevin Quinn

as Lord Vyndktvx in A Movie About Superman That Doesn't Have Superman In The Title