Bard Meets Legolas
Films: Bard and Legolas meet while encamped outside Erebor.
Books: Legolas does not appear anywhere in the story.
Pro: Since Bard’s men and Thranduil’s elves were encamped together, it is not unreasonable that Thranduil’s son Legolas would be among them.
Con: This is an unnecessary addition to Tolkien’s story.