Mothra has an all-new kaiju nemesis in Godzilla continuity, and this monster is a literal world-ending threat that's perfect ...

Godzilla has faced off against a variety of villains since the 1960s, including popular foes like Ghidorah and unique monsters like Kamacuras. Not all of Godzilla's opponents are true villains ...

While Mechagodzilla was a nice bit of fan service, realistically it didn't offer too much threat to either Godzilla or Kong.

including the mighty Godzilla, who collides with Mothra, Rodan, and his ultimate nemesis, the three headed King Ghidorah. When these ancient superspecies, thought to be mere myths, rise again ...