Dinotopia

A sudden attack by Wulf, a clever and traitorous lord of Rohan seeking vengeance for the death of his father, forces Helm Hammerhand, the King of Rohan, and his people to make a daring last stand in the ancient stronghold of the Hornburg.

Faced with the suspicious death of their father, two brothers must motivate one another to get back on their bikes and take the Las Vegas Motocross Championships by storm.

Before they can complete renovations on their new country inn, a widowed father and his young daughter are visited by a strange group of tourists. He soon makes a chilling discovery: they are disaster junkies from the future who visit the past to witness history's greatest catastrophes—and his small town is their next stop.

A young man finds out that he holds the key to restoring hope and ensuring survival for the human race, while an alien species called the Drej are bent on mankind's destruction.