Foster on Film

A nuclear sub crashes into an iceberg, freeing Godzilla, who heads to Tokyo. Meanwhile, a buffoonish pharmaceutical executive sends two agents to a tropical island where they discover King Kong. When Kong drugs himself on narcotic berry juice, the nitwits decide to bring him back to Japan (just assuming that the drug will keep him

The surviving aliens from the 3rd Planet rebuild Mechagodzilla.  With the aid of a bitter scientist and his android daughter, they gain control of  the giant dinosaur, Titanosaurus, and send both creatures to destroy Tokyo.  Godzilla, in his last appearance as a hero, stomps into town to defeat the bad guys. A direct sequel to