I know it's brand new so may not go very low, but any little bit will help.
I usually don't buy video games (except for Disney Infinity, video games are a "dads house" thing) and this slipped my mind in all of my Xmas shopping prep!
We have pretty good luck with GameStop. They have a website if there isn't one near you. They are usually a little cheaper than the department stores, but not a whole lot. I don't know when that game came out, but if it was even a few weeks ago, they might have a used one that will be cheaper. We have really good luck with them. If you set up a rewards account, you will also get discounts. Good luck!!
Target also will have sales when games first come out or a $5 Target card when you buy it or something. We usually check Target, GameStop and Costco and go with the cheapest among them.