There are some mild references to mating.

Deer is shown getting eaten in a gruesome manner by a pack of wolves

Giant monsters battling each other. Some shooting

Severe violence and gore.

Rodan is seen flying over Isla De Mara and killing people and destroying buildings.

There are two utterances of the expletive "fuck" and some use of swear words such as "shit", "hell", "bitch", "damn" and "ass". A chunk of which is said by a teen. Also GD x 2; Jesus as an exclamation x2)

One of the characters says you got to be fucking kidding me

8 uses of shit 1 use of fuck and bitch 3 uses of Jesus

In one scene, Ghidorah rises up from Rodan's volcano and delivers a terrifyingly loud roar, striking a dramatic pose as the background shows a cross and the sky is hellish. The whole concept is highly reminiscent of Satan rising from Hell in the Book of Revelation, and it can be extremely frightening and disturbing for some viewers.

This film is MUCH darker than any other "Godzilla" film so far, having the look and feel of an apocalyptic film by featuring prolonged sequences of indiscriminate wanton mass destruction and colossal collateral damage and extreme frenetic mayhem throughout, as well as religious allegories, Satanic imagery and themes, lots of brutal killings and graphic violence, plentiful amounts of ruthless action, a brutal atmosphere, and a relentlessly oppressive and foreboding tone.

Recreations of Godzilla, Mothra, Rodan, and King Ghidorah may scare some. Also expected destruction and peril, and a devastating (but unexplicit) body count from the monsters.