Sequels have a chequered history. With a few notable exceptions (The Godfather 2, Toy Story 2, Despicable Me 2), they usually fall well short of the original. And, by the time number three comes along, any resemblance to number one is likely to be purely coincidental.
You wonder why they make them – and you’ll certainly wonder that about Nativity 3: Dude, Where’s My Donkey?! Yet it arrives…