Yes. considering there were sales from headroom to $720 a few months after release, it is reasonable to assume that the profit margin is large enough that the price can drop dramatically. I would estimate in a few years though. I doubt that there will be any official pricing changes from Hifiman until after ALL the old stock of HE-400s and HE-500s are gone. I think earliest would be late fall next year (in time for the holiday season), though my bet would be 2-3 years later. Price of all headphones drop as time goes on, more so in the mid-range class though. Luxury headphones tend to hold their value until something new replaces it.
The previous HE-500 price drop was in late fall right before the holiday season. The official reason was that increase growth in new markets, but I think probably just the demand wasn't as high as expected or something like that, so price was moved to be more competitive. Only time will tell how popular the HE-560 will be. Probably one of the best sub-$1000 headphones right now (imo of course heh!). I wonder if there is anything else in this $500-$1000 price bracket can sonically compete. Maybe LCD-2?
If you are patient, I am sure you can find a sick deal for them within a year. I would check headroom and razerdog during black friday.