(about the matrix I liked all the three parts, but the first part was the best)
In Prince Caspian there is the longest battle of all the parts of the Chronicles of Narnia.
First Peter, Susan, Edmund and Lucy get to Narnia.
There they meet a dwarve and it looks out to be that there is and partly was this battle going on:
-First they are fighting and it's not going well for the Old Narnians. (In the movie this will be very exciting I think). Then Caspian, the leader (sure) of the army, takes the decision to blow on the horn of Susan (there is a hope that by blowing the horn Peter, Edmund, Susan and Lucy or Aslan will come). At that moment Lucy, Edmund, Susan and Peter will be cakked by magic.
-Before that Caspian had send messengers to Cair Paravel and to Lantern Waste. The dwarf is one of them.
-Then there is the very exciting travel to Aslan's how in which the Pevencies almost are killed by the arrows from the Telmarines. And where Lucy sees Aslan and here sister and brothers not.
- If they come to Aslans how they see Aslan. Peter, Edmund and the dwarve are going into Aslans how where They'll meet Caspian (and two of his friends), a traitor, a witch and a werewolf. The last three want to call alive again the White Witch, but Caspian doesn't want that so he and his two friends have a battle with the werewolf, the witch and the traitor. They are losing the battle when Peter, Edmund and the dwarve come in and help. The werewolf, the traitor and the witch are killed (however this happens in darkness and the public won't see everything, but it's possible the movie might be else). In the meantime Aslan, Lucy and Susan are going to Beruna where they cause a lot of chaos and where there is a groep of boys who turn into pigglets and where a man turns into a tree.
- Then the Battle of Beruna is near. First Peter challenges Mirax for a duel. The duel comes, but in Miraz' armee are two traitors who kill Miraz and say Peter is a traitor, so a bigger Battle begins. Peter is almost killed, ALMOST. A battle begins, but it won't be long. The trees are coming alive again. And the Telmarines become frightened. They flee to Beruna, but the bridge there has been destroyed by Aslan and his friends. The Telmarines are afraid of water so they don't flee further and are arrested by Aslan.
The battles are over after that, the Pevencies return tho earth and Aslan tells Peter and Susan that they are to old for Narnia and won't return.
Time to come home and have a lot of tears.