Topic on User talk:The H-Man

I've wondered about that, too. I'm kinda pressed for time this afternoon but fortunately I have some pics from a recent Facebook discussion about this that I can dump here to augment this summary.

I'm very skeptical about the whole "NankaiGoji" / "a new head was built for part of Ebirah". To me, it just looks like the same Monster Zero costume in various stages of wear, tear, and repair. My hypothesis is that the Ultraman episode (broadcast September 18) would have been completed before Ebirah started filming (Cyberkids had a draft dated August 24), and that the Daisenso head was stitched back onto its original body in time to shoot Ebirah. (I'm not sure yet what to make of these screenshots and bts pictures of MosuGoji or, possibly, the hybridized "Jiras" costume in Ebirah.)

In brief, my idea is that they didn't build a new head, they just gave Godzilla a "face lift" towards the end of production on Ebirah. I think this was necessary because the materials in the face visibly sagged and shifted to the point that the eyes were almost entirely obscured when photographed at some angles. All they apparently did was pull the brows up and back to re-expose the eyes.

I really should have expanded this to include other screenshots from early in the production of Ebirah, but I have to make do with what I've got online. Nevertheless, I think it illustrates my point well enough. I also have this left profile comparison. IMO, the "NankaiGoji's" face shows too many similarities to the original DaisensoGoji's look for it to be a brand new head. For example, compare the definition in the "musculature" of Godzilla's left cheek. And the way the right cheek hangs over the mouth is consistent even back to its original appearance in Monster Zero. The lower lip appears unchanged, too.

Only circumstantial evidence, of course, but I think it's more likely than not.