I've seen the same in some UK retailers, the margins are generally tight but there's been so many refurbished machines in the Apple Store for months now and retailers like Amazon UK have been offering over 12% off since February (with periods of higher discount than that) and are now showing 2-5 weeks dispatch time. John Lewis have modest £50 discounts but seem to be out of stock of many Space Grey models with single digit stocks on certain silver ones.
Given the troubles Apple have had with the Rev A 2016 models I think we can fully expect the 2015 models to escape the cut and the 2016 models to be consigned to history within the Apple refurbished store in due course.
Spec wise, it'll be Kaby Lake (circa 200MHz boost model for model) with revisions made to the internals to hopefully fix the keyboard issues due to heat, perhaps even introducing the terraced battery that was not used in the 2016 model due to failing a 'key test'.
