A More Realistic Take on Ghidorah

To be fair, there is no way to make King Ghidorah remotely realistic, MechaGodzilla and Destoroyah would both actually be more believable than any take you could possibly give for King Ghidorah's origin, space or otherwise. 

Hell, if anything, a three-headed space hydra that can shoot lightning from his mouths is actually more likely to be found in space than here on earth. 

I don't know... I feel like the the Gareth-verse would have a hard time justifying MechaGodzilla.

Short of alien forces and maybe SpaceGodzilla, nothing would be too far out there for this franchise with Ghidorah being in it. A three-headed golden dragon that can shoot lightning from his mouths, space or otherwise, is actually less believable than a robot Godzilla. Hell, they pretty much laid the groundwork for a MechaGodzilla appearing with the Godzilla skeleton found in the cave, he would easily be more realistic than Ghidorah if they built him from that (similar to Kiryu), which isn't saying much, but still.

Not sure if I agree with that. But I'm also not sure how I feel about them rehashing the concept for Kiryu. Seems like, "been there, don that" regardless of how well the Kiryu concept was originally realized.

Mechagodzilla is almost an inevitability for the third film. If Toho chose to sell the rights to Mothra, Rodan, and King Ghidorah to Legendary, Mechagodzilla is no doubt their next choice. The marquee value of Mechagodzilla is pretty high, so Legendary acquiring the rights to him would be a good business decision. The problem is, how does Legendary justify the construction of a 300-foot advanced robot built in the image of Godzilla in this grounded universe? Giant creatures evolving by themselves without human involvement is one thing, but giant man-made robots are another. I think Legendary might establish the third film as being an almost post-apocalyptic setting following the events of the second film and justify mankind putting together all of their resources to construct Mechagodzilla to protect themselves from future attacks. As for using Kiryu's origin, building Mechagodzilla around the skeleton of another Godzilla is the only way I see them justifying a robot built in Godzilla's image.

Just because MechaG is the last of the Toho big 5 I don't think that puts him quite as high as people think for him to be in the 3rrd movie. Sure he's one of the more likely candidates but I don't see him being head and shoulders above a few other monsters.

@ KING OF THE MONSTERS: with Ghidorah showing up, anything short of alien forces, UFOs, and maybe SpaceGodzilla, etc is possible, if they can justify a giant, three-headed golden space dragon that can shoot lightning from his mouths appearing, they can justify a mech created in Godzilla's image (with reasonable modifications, of course), especially with the Gozilla cavern bones, and their rationale for building him is quite obvious: the humans would obviously be in fear of more monsters eventually emerging after the MUTO invasion, hence they would want something to combat them with.

And I guarantee you, if they went with MechaGodzilla for Godzilla 3, he would be built using the Godzilla skeleton from the cave.

But such an endeavour would take a very long time with a lot of resources spent for development. The first Jaeger in the PR universe took over a year to develop, and even late into the Kaiju War, it was extremely hard to create more. We have to consider what's reasonable on the Human side of things.

A Mecha-Godzilla? Not very likely unless given at least more than 3 years straight to make. As well, why make a Mecha-Godzilla? A machine in the image of such an imposing monster isn't exactly something Humans would come to the conclusion of in the Legendary-verse, I wouldn't think. Anti-monster weapons of an exotic nature? Sure, evenutally.

But a completely free-standing cybernetic impersonation of the most powerful of the ones to crawl out of the woodwork? We get into murky territory. Sure, it's no less ridiculous than King Ghidorah, but it's almost certain he'll have no no Human influences on him. But the Humans in the Legendary-verse are supposed to be no different than the regular ones.

I doubt such ideas would truly prop up at any reasonable interval for the Human minds of this universe.

I think Mechagodzilla can be pulled off in the third film as long as he is given explanation and a lot of backstory. Monsters like King Ghidorah would benefit from an ambiguous origin because they are the result of unobserved phenomena beyond human control. I'm sure that if Mechagodzilla is constructed, it will be explained that he took several years to be constructed. As for why a robot would be built in the image of Godzilla, perhaps Mechagodzilla's designers would realize that Godzilla has the perfect form for something of his size to fight other giant monsters effectively. And since there is a Godzilla skeleton readily available, that would explain how the humans would get the framework for the machine and why of all the kaiju they chose to make a robot version of Godzilla. If they can pull of King Ghidorah, then they can pull off Mechagodzilla. It will however require a lot of explanation and tweaking.

Why make a MechaGodzilla? Probably because there's a Godzilla skeleton already available and building a machine around it would thus, inevitably make it resemble Godzilla. Plus, they could say in the second movie they've been building him since the MUTO invasion in the second movie, thus giving them 4 years to make. They could say they finished construction at the end of the second movie, thus have a special ending with them panning inside the metal casing and glaring yellow eyes before the end credits, I think that would be pretty cool.

And again, don't talk about any monster being unreasonable for this franchise when they're giving us a giant three-headed golden space dragon that can shoot lightning from his mouths, that's as unrealistic as it gets right there. Again, MechaGodzilla and Destoroyah are more realistic than he is, and that's really saying a lot, too, when you think about it.

Unrealistic is definitely not what I think. King Ghidorah proves the Legendary-verse has a lot of ludicrous stuff in it. But then we come back to my argument that was somehow ignored........

Why would the Humans come to the conclusion of a Mecha-Godzilla?

You guys keep forgetting that the new movie, and Gareth, has established that the new universe is about the emergent threat of giant monsters, and how Humanity would react if it did happen to them. How would they react? How would WE react?

"We" meaning ordinary people, ordinary governments and militaries. Would research into unconventional countermeasures occur? Definitely. Would we come up with some less-than-ordinary ideas for such countermeasures? For sure. Would the idea of a Mecha-Godzilla come to mind for the political and military heads leading the charge?

THAT'S where things get a bit complicated. Just because we have a skeleton, time, and a reason doesn't mean that idea would necessarily pop up, or even be an idea. We have to think......... what would  the real world try to do? What would real-life militaries and governments do?