Hi everyone, I heard this first hand, although it remains unofficial at this point.
Pioneers who are currently serving, will get the new replacement to the old Pioneer Book (1977). I was told they most likely would go back to pioneer school to get one. There is new information in there, though I wasn't told what it was.
Bad news is (if you can call it that), that pioneers who are no longer on the list will not get the new book. This means that even if a pioneer had served for 25 years, that one will not get the new book.