What do you think the “colossal, undiscovered threat” will be in the next movie?

Xenotaris

for your credit, i remember that line in the english dub as well

HinikunaGoji,
While the English dub is a bit confusing, there's no line in it that mentions SpaceGodzilla.

I know, i just remember it, does not actually mean it happened

I just thought of something. What if the main antagonist for the film is a reimagined version of the Gryphon from the unmade 1994 Tristar Godzilla film? One of the writers of that script is working on the new film and since the 1994 movie was never made, the Gryphon probably isn't copyrighted and owned by Tristar, so the concept for it could be used in a future film. Probably unlikely, but it would be interesting if they went in that direction.

Maybebut wasn't part of Gryphon incorporated by the MUTO? I think I read that on Tv Tropes but I could be wrong. 

Xenotaris

The MUTOs had some similarities in their role, being the main threat of the movie with Godzilla being an Earth defender, but aside from that they were very different from the Gryphon. The Gryphon started out as an extraterrestrial probe sent down to Earth by a war-like alien race as a weapon to conquer Earth. The probe mutated a group of bat-like creatures (called Probe Bats in the script) and sent them to collect various Earth creatures. The probe absorbed these creatures and the Probe Bats, using their DNA to mutate into the Gryphon.

SasquaDash

That sounds awesome, now I want a movie with Gryphon in it

Xenotaris

Same. I always thought the concept of the Gryphon and the Probe Bats was a really cool and unique idea (plus the concept designs for them were awesome). I would love to see a Godzilla film that revisits that concept. Godzilla 2000 kind of came close to that idea with Orga's origin, but not to the extent that the 1994 script did.

It's probably unlikely that we'll ever see the Gryphon in an actual Godzilla film, but given the fact that the writer of the 94' script is involved with new movie and wrote parts of Godzilla vs Kong, it's possible that they could reuse certain ideas from that script for future instalments. Godzilla vs Kong actually had elements of the 94' script in it. The scene where Godzilla goes down on all fours and hunts Kong through the city and his more fierce, agile fighting moves were inspired by Godzilla's fight with the Gryphon in the 94' script. In the script the military captures Godzilla and uses a collar filled with a mysterious fluid to keep him sedated, however when the Gryphon arrives, they're forced to release Godzilla and destroy the collar so that he can fight the Gryphon (similar to what happens with Kong in the first battle with Godzilla). Heck, even the scene with the Hell Hawks is eerily similar to moments featuring the Probe Bats in the 94' script.

A part of me wished the American Godzilla 1994 was made but then we wouldn't have the awesome design that was Zilla nor MonsterVerse Godzilla

Xenotaris

Yeah, as much as I would've loved to see that film be made, we probably wouldn't have gotten stuff like Godzilla the Series, the Millennium series, or the MonsterVerse. So, in a way, that film being cancelled allowed the other projects to be made.

Honestly, I'd place my bets on a Toho kaiju.  But Rhedosaurus sounds like a cool idea too.

also welcome back Sonictiger

It would be awesome if mega kaiju from pacific rim was in the movie

I think they were going to make gigan maybe