Yes, you can preorder it for that price at Target.com right now. http://www.target.com/p/lego-dimensions-new-ghostbusters-story-pack/-/A-51296804
Amazon may also match- just have to wait and see. If you want to help the process along, go to the Amazon page for the product https://www.amazon.com/Ghostbusters-Story-Pack-Not-Machine-Specific/dp/B01GPB677W/ and scroll about halfway down to the "Product Information" section. There is a subheading for "Feedback", and under that is a link "tell us about a lower price." Click that and submit the Target link and pricing info. No guarantees that they will drop to match, but I've seen them do it many times.
So I just pre-ordered everything that I could find on Amazon. Hopefully some deals will drive the price down.
Did I miss anything?
I'm not sure if it's because of Prime Day or the film's release, but the pre-order for the Ghostbusters Story pack is down to $42.49.