[The Saucepan Man]

Um, it's just the editing. That's what trailers do. They mix up different sections of the film to heighten the tension and excitement. So don't get hung up on the order that events appear in the trailer.<P>I cannot imagine that Eowyn and Merry meet the Witch King anywhere else but on the Pelennor. <P>And it seems that Pippin does meet Merry on the battlefield, presumably in the aftermath of the battle. But that would only be a small change from the Book, where Pippin finds Merry stumbling through Minas Tirith just after the battle.