Toho's decade's long hiatus of producing any Godzilla films begins, lasting until 1984.
In the Kaiju Multiverse
The aliens from the Third Planet in the Black Hole return to conquer the Earth. They, along with the deranged marine biologist Doctor Shinzo Mafune unleash a rebuilt MechaGodzilla and a dinosaur called Titanosaurus upon Japan. Thankfully, Godzilla arrives and does battle with the two monsters, eventually destroying MechaGodzilla for a second time and knocking Titanosaurus back into the sea. (Terror of MechaGodzilla)