Kaiju`s

Current Kaijus found in the traillers : 

Winged Muto

Winged Muto unoficial look.

The Winged muto has been not officialy show yet.The footages seen in here are taken from the wiki page.It may be deleted.Roars are still not shared.No permission gaved from Warner Bros/Legendary.Might be recorded after.It`s also smallest monster in the movie.

Unnamed Multi Legged Monster

Everyone thought that monster`s name is "Talaghan" But no.Someone trolled on Godzilla-Movies.com .It is confirmed that monster will be repelaced by Normal Muto.However,Gareth said that footages like behind the scenes or something else on DVD will contain footages of that unknown creature.Some fans call it "Vishnu".Someone said that it has been brutally killed by godzilla.Godzilla ripped his neck and continued to fire at his wound using his Iconic Atomic Breath.

8-Legged-Muto

Godzilla on left and muto on right.

This image is official.It shows both Godzilla and 8-Legged Muto.Compared to Godzilla,The eight legged muto is in simlar size to godzilla,But the winged muto,Is really small.Even less weight than Building.8 Legged monster image is also revealed which shows him (Possibly) Trapped in the Power Lines.

Godzilla

Godzilla Roaring to winged muto after seeing his small size.

This image shows Godzilla from WonderCon trailler and "It Cant Be Stopped" TV Spot.This is one of the best footages of him.Also,Notice the gills near his head.
Godzilla is the biggest kaiju in the movie.The Muto`s are planning to make eggs on godzilla,To make mutos grow with godzilla`s radioactive power.