Since the original Godzilla died at the end of the movie I fear we will be getting an origin story...
Not necessarily. Godzilla Raids Again
and the Godzilla Against Mechagodzilla/Tokyo SOS
duology simply had a second member of the Godzilla species show up. GMK stated (and G vs. Megaguirus
implied) that the original Godzilla had only been nearly killed and had a '90s-Wolverine-like ability to regenerate if any part of him survived. And The Return of Godzilla
apparently just had Godzilla show up without explanation -- and later films in the same continuity gave mixed messages about whether it was the original (G vs. King Ghidorah
) or a second one (G vs. Destroyah