Suggestions by @jurassictransformers

Willem Dafoe

as Kraus in Godzilla B.C

Rebecca Ferguson

as Cornelia in Godzilla B.C

Gerard Butler

as Artemus in Godzilla B.C

jurassictransformers

as Writer in Godzilla B.C

Bear McCreary

as Composer in Godzilla B.C

Michael Dougherty

as Producer in Godzilla B.C

Matt Reeves

as Director in Godzilla B.C

Warbat

as Additional Monsters in Godzilla B.C

Skullcrawler

as Additional Monsters in Godzilla B.C

King Kong (MonsterVerse)

as Additional Monsters in Godzilla B.C

Camazotz

as Additional Monsters in Godzilla B.C

Tiamat

as Additional Monsters in Godzilla B.C

Scylla (Monsterverse)

as Additional Monsters in Godzilla B.C

Behemoth

as Additional Monsters in Godzilla B.C

M.U.T.O.

as Additional Monsters in Godzilla B.C

King Ghidorah (MonsterVerse)

as Additional Monsters in Godzilla B.C

Mothra (MonsterVerse)

as Additional Monsters in Godzilla B.C

Rodan (MonsterVerse)

as Additional Monsters in Godzilla B.C

Dagon

as Additional Monsters in Godzilla B.C

Biollante

as Biollante in Godzilla B.C