The movie stresses the importance of the wonder of childhood, including belief in Santa, the Tooth Fairy, the Easter Bunny, etc. Preserving the innocence and joy of childhood is the reason the Guardians exist. Although the movie isn't religious, the idea of faith in something you can't necessarily see is demonstrated as a positive force in children's lives.
(Potential spoiler alerts!) Some intense action. Pitch Black and his minions are able to destroy one of the Guardians. The other Guardians begin to lose their powers as children stop believing in them. Pitch cleans out the Tooth Fairy's castle, breaks all of the Easter Bunny's eggs, and generally breaks the hopeful spirit of all the children he encounters. He undoes the work of the Sandman so that kids have nightmares instead of sweet dreams. Pitch's shadowy black stallions can be frightening. In a flashback, viewers see that the boy who was Jack Frost drowned saving his sister and then transformed into the icon of winter. Santa uses swords.
The Tooth Fairy seems smitten with Jack Frost, and a couple of her "baby" fairies swoon in his presence. In one brief scene, Tooth and Jack share a moment of staring in each other's eyes.
Australian Easter Bunny says "bloody" this and "bloody" that fairly frequently; Pitch Black tells Bunny to "go suck an egg," and some insults are thrown back and forth, including "coward."
No product placements in the movie, but there's a good bit of Rise of the Guardians merchandise available, from plush sets and figurines to games, apparel, calendars, and more. The story is also based on a book series.