I booked our Jan 2016 WDW trip in July of 2015. When it was early October, Disney released specials and saved 20% instantly off my AKL stay. Was initially $312 per day went to $250 per day after the sale in October on disney's website.
From what I hear, the CAD is going to go down further but we don't know what's going to happen. ((I'm a canadian living in the US)