Here is an isolated layout of the rough King Ghidorah / Monster Zero head concept.
I was brought on to the Godzilla: King of the Monsters pre-production phase through Studio ADI to help design Rodan, King Ghidorah and Mothra. Before focusing on Rodan, I worked on King Ghidorah / Monster Zero. I went through a handful of designs, starting with quick thumbnail silhouettes, then flushed out / blocked out, rough 3D concepts all under the supervised by Tom Woodruff Jr.
This design explored a more serpentine body suggested by Director Michael Dougherty.