When a Former Special Ops commando visits Pompeii, his wife and daughter are trapped as Mt. Vesuvius erupts with massive force. While his family fights to survive the deadly onslaught of heat and lava, he enlists his former teammates in a daring operation beneath the ruins of Pompeii.

Morgan and his friends are on a hunting trip on a remote Canadian island when they are attacked by a swarm of giant wasps. Looking for help, Morgan stumbles across a barn inhabited by an enormous killer chicken. After doing some exploring, they discover the entire island is crawling with animals that have somehow grown to giant size. The most dangerous of all of these, however, are the rats, who are mobilizing to do battle with the human intruders.

Throughout history, tales of chivalry have burnished the legends of brave, handsome knights who rescue fair damsels, slay dragons and conquer evil. But behind many a hero is a good-for-nothing younger brother trying just to stay out of the way of those dragons, evil and trouble in general. As two princes on a daring mission to save their land, they must rescue the heir apparent's fiancée before their kingdom is destroyed. Thadeous (McBride) has spent his life watching his perfect older brother Fabious (Franco) embark upon valiant journeys and win the hearts of his people. Tired of being passed over for adventure, adoration and the throne, he's settled for a life of wizard's weed, hard booze and easy maidens. But when Fabious' bride-to-be, Belladonna (Zooey Deschanel), gets kidnapped by the evil wizard Leezar (Justin Theroux), the king gives his deadbeat son an ultimatum: Man up and help rescue her or get cut off. Half-assedly embarking upon his first quest, Thadeous joins Fabious to ...

Three pets (Chance, a young dog unfamiliar with the world; Shadow, an aging, wise dog; and Sassy, a snobby cat) are left behind when their family goes on vacation. Unsure of what happened, the animals set out on a quest to find their family. This journey across America is very dangerous and the animals risk never seeing their masters again. The group of pets travel across forested mountains and areas of wide-open countryside, while their family searches for them in the same areas.