The overlapping generations discussed at the latest District Assembly includes all of the anointed remnant of human's still alive during the conclusion of the system of things, but also includes the 144,000 in its entirety, as they're likewise living contemporaries of the modern anointed remnant.
This would include Jesus disciples, apostles and first century Christians that took note of events in the first century and the remaining remnant of the anointed class in the last days.
Matthew 24:34 applies to the 144,000.
Actually, I don't think they currently include any of the "dead" or "resurrected to heaven" 144,000 as part of the generation.
I thought it was only the ones born in 1914 and those they overlap with, that are still alive today.
I could be wrong, however, because before this they said that "evidently" the generation was those contemporaries (meaning people alive today) that denied that Jesus was invisibly present.
And of course that was "new light" from the previous explanation that the generation was alive in 1914, and before that the generation was those that were alive and at an age of understanding in 1914.