Goji wrote:RETURN OF GODZILLA was meant to be Godzilla's return to form. If any other monster were to be added, it would have been the original version of Bagan. How would you have integrated Anguirus into the version of ROG that we eventually got? I'm just curious as to how that would work, other than it "sounds cool".
King Ghiodrah wasn't a space monster in VS. KING GHIDORAH, so adding Gigan would be nonsensical unless his origin was rewritten. I suppose you could have had him built by the Futurians..but then what would they have needed King Ghidorah for if they already had a monster to battle Godzilla?
Near the end of ROG the high frequency sound lours Godzilla to Oshima Island. The sound could have also attracted Anguirus and the two kaiju brawl and eventually they both fall into the volcano.
To work in Gigan, I would add a portion to the film. The movie steps into the future where Godzilla has destroyed much of the world. As a last ditch effort the bio-weapon Gigan is sent out to do battle with Godzilla. After Gigan is defeated Emmy has the idea to go back in time and make Mecha King Ghidorah.
Or maybe add a scene to the part of the film where the Futurians are warning Japan's leaders that Godzilla will turn Japan into a nuclear graveyard. While they are explaining the situation have a scene set in 2204 where Godzilla does battle with Gigan in a demolished city.