Imagine a question and stream-of-consciousness explanation for which this is the answer: Prince Caspian

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Question: The Chronicles of Narnia is a series of films based on The Chronicles of Narnia, a series of novels by C.S. Lewis. From the seven novels, there have been three film adaptations so far -- The Lion, the Witch and the Wardrobe (2005), Prince Caspian (2008) and The Voyage of the Dawn Treader (2010) -- which have grossed over $1.5 billion worldwide among them.

What is the sequel to the lion the witch and the wardrobe?
Stream-of-consciousness: To answer this question, we should know that: From the seven novels, there have been three film adaptations so far -- The Lion, the Witch and the Wardrobe (2005), Prince Caspian (2008) and The Voyage of the Dawn Treader (2010) -- which have grossed over $1.5 billion worldwide among them.