It looks to me like the Society is rapidly moving back to the February 2008 Watchtower "new light" on "This Generation," which said this:
* Jesus used "This Generation" to mean "Anointed Ones."
* In the first fulfillment, Jesus was promising that some Anointed Ones would still be alive to witness the events of 70 C.E.
* In the secondary fulfillment, Jesus was promising that some Anointed Ones would still be alive when Jesus returns to judge the Sheep and Goats.
The new 2015 JW Research Guide posted on JW.org lists this 2008 Watchtower article as the first article people should read about the "Clarified Understanding" of the Generation.
This 2008 view also matches the statement in the New 2015 Jesus--The Way, The Truth, The Life book, which says that "This Generation" refers to disciples who see the signs of the last days.
I think they are abandoning the overlapping part.