Lord Gappa wrote:Like kpa already stated, whos to say the mutations weren't immediate? He could have been stowed away on said island while he grew into King Ghidorah.
Exactly. Since King Ghidorah was a genetically engineered creation intended as a weapon, it would have been designed to function as the Futurians' needed. And since they didn't need it until 1992, it seems unlikely a flying monster would be left to act on its own for 50 years (with no one noticing, to boot). So I would go with simple options, which would include Ghidorah being dormant (perhaps undersea) until summoned, or the gestation from Dorats to Ghidorah being a slow process that took decades to complete. Neither of those options are official but they don't contradict anything shown in the movie.