Not too surprised. I'd say everyone who wanted to see it saw it in the first 2 weeks. Plus, let's face it, this is the same weak box office period in between Thanksgiving and Christmas that hampered the Muppet Movie last year. It's just that Guardians overtook it that kinda gets me. It wasn't doing oh so well... it was the top kid's movie out of 2 kids movies because the other one was out since the second of November (A wise choice for Disney considering, as I said, same weak weeks that hurt The Muppets after a strong opening weekend).
Shame, because it was one of the GOOD Dreamworks films. William Joyce worked on it based on his own books. I tell yah... give North his own spinoff movie, you have one of the best Christmas films in decades.