It won't arrive in theaters until May 16, 2008 -- but Disney has already unveiled the first official one-sheet for The Chronicles of Narnia: Prince Caspian, and Cinematical has it up for all to see.

Prince Caspian, the sequel to 2005's The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe, follows the further adventures of the Pevensie clan in Narnia. From the synopsis:

The characters of C.S. Lewis's timeless fantasy come to life once again in this newest installment of the "Chronicles of Narnia" series, in which the Pevensie siblings are magically transported back from England to the world of Narnia, where a thrilling, perilous new adventure and an even greater test of their faith and courage awaits them.

One year after the incredible events of "The Lion, the Witch and the Wardrobe," the Kings and Queens of Narnia find themselves back in that faraway wondrous realm, only to discover that more than 1300 years have passed in Narnian time. During their absence, the Golden Age of Narnia has become extinct, Narnia has been conquered by the Telmarines and is now under the control of the evil King Miraz, who rules the land without mercy.

The four children will soon meet an intriguing new character: Narnia's rightful heir to the throne, the young Prince Caspian, who has been forced into hiding as his uncle Miraz plots to kill him in order to place his own newborn son on the throne. With the help of the kindly dwarf, a courageous talking mouse named Reepicheep, a badger named Trufflehunter and a Black Dwarf, Nikabrik, the Narnians, led by the mighty knights Peter and Caspian, embark on a remarkable journey to find Aslan, rescue Narnia from Miraz's tyrannical hold, and restore magic and glory to the land.

There's a lot going on in that story -- and fittingly, there's a lot going on in the poster, which you can see by clicking on the link below!

Source: Cinematical