Take a look to this new international banner poster of Voyage of the Dawn Treader aka Narnia 3:

Voyage of the Dawn Treader Trailer

(Click on the poster to enlarge.)

The Dawn Treader is the first ship Narnia has seen in centuries. King Caspian has built it for his voyage to find the seven lords, good men whom his evil uncle Miraz banished when he usurped the throne many years earlier. His Telmarine ancestors had never built ships as they had always feared the sea.
The journey takes Edmund Pevensie, Lucy Pevensie, their cousin Eustace Scrubb and King Caspian to the Eastern Islands, beyond the Silver Sea. Their mission — on which rests the fate of Narnia itself — takes the courageous voyagers to mysterious islands, a river that turns to gold, confrontations with magical creatures and sinister enemies. They will meet Lilliandil the half-star and reunite with their old friend and protector, the great lion Aslan. They will also have to save Narnia from an “unfathomable fate”, including a mysterious green mist in the form of the White Witch.
:)