candidate: " Before the first one was finished we talked about what the whole story of Shrek is , and each of the chapters answers questions about the first movie and gives us an insight , " said Katzenberg , "" Shrek 3 " and " 4 " are going to reveal other unanswered questions and , finally , in the last chapter , we will understand how Shrek came to be in that swamp , when we meet him in the first movie . "