So, as everyone knows in the end of Tokyo SOS, Godzilla's DNA is put into a freezer, where other kaiju DNA is seen, the DNA of Rodan, Varan, Mothra, Maguma, Manda, Dogora, Baragon, Oodako, Sanda, Gaira, Gorosaurus, Giant Sea Snake, Kameobas, Ganimes, and Gezora. And in the photo, we see Kumonga and Kong. So after the whole 'Mothra doesn't like it when you do this!' speech by the Cosmos, men mess up and make an army mechs from the DNA and apparently, CLONED bodied of passed Kaiju.
Honestly, I would have liked to have seen this more than Don Frye Beats Aliens Ups with Special Guest: Godzilla.