Godzilla: King of the Monsters’ first trailer didn’t just bring the big G with it: it promised, well, monsters. Several of them, actually, all ready to challenge him for his title. For fans of Godzilla’s many Japanese films, these foes are some iconic familiar faces, but if you’re fresh to the world of Kaiju outside of the 2014 Godzilla movie, here’s what you need to know.