After Terror of Mechagodzilla ended with Showa goji swimming off into the sunset, what do you imagine was his final fate? We know he winds up killing KG in DAM in 1999 but then what? Does he live out his days till he drops dead? Does he go out with one last hurrah fighting some unknown evil force? Do humans, still considering him a threat, finally put an end to him? After all, they locked him up on Monster Island in the future despite the fact that he had saved not just Japan but the world countless times.
I have almost nothing serious to add to any conversation ever.