Of those four, only Rodan didn't wind up as the focus of a Godzilla versus movie in the Heisei era. As the book explains, Toho's plans for Godzilla vs. Mechagodzilla II may be why that was the case.

Ultimately, Banno's efforts paid off. Toho agreed to the new plan, paving the way for Legendary Pictures to wind up with the rights to Godzilla. But as a consequence of the new contract ...