Original isn't ever clear on if nuclear testing just woke him up, or if mutated from it, iirc.
But yeah, rampage of destruction.
After that, its him getting woken up by periodic disturbances.
Then, he fights king kong and frankenstein.
Then they make a giant robot to fight him.
then aliens try to kidnap him.
About this time, he retreats to Monster Island instead of living underwater.
He has a kid. does a jig.
By this point most of Japan has formed cults around giant monsters. Mothra cult. etc.
These cults call to their giant monster gods to save Japan from Godzilla and the aliens.
Aliens brainwash all the monsters, and Godzilla has to fight them all.
I think this movie is Biollante.
Gozilla probably wakes up. Rampages. nukes didn't work. but they got blood samples from the corpse we see.
They inject that dna into something. plant/animal, with a mechanical componant/cyborg, so they think they can control it. it gets out of control. its a biological monstrosity that can incorporate mechanical aspect into itself, as that brief shot of the artillery shell.
Flying. Not sure. possibly aliens. we get a shot of something big and mechanical crashing into the water along with the planes.
1:30
Hrm. ok. maybe its just wings folded back?
Flipping between the frames.
yeah. its Rodan.