Sorry but I do not have your chart on file, so can't respond much to your own transits...have to see the chart as a whole. What houses are ruled by this pairing of planets? And what are the natal aspects?
As per my own Saturn/Neptune conjunct, in the 12th, significant transits there certainly were rather life changing; yes I am now on my second Saturn Return,which was really rather devastating the first time around, and I am noticing certain similar themes that seem to be arising in terms of losses and set-backs.
When Pluto transited my Neptune, I was carrying my second child, which I was happy about, but in the following year it went retrograde back over Neptune, and I found myself unexpectedly pregnant again...there were too many complications in my life at that time, due to marital instabilities, and I had to terminate that one [please no comments from pro-lifers; I have paid my dues and have suffered enough] ...Now with my recent Saturn return, I have lost contact with 2 of my grandchildren, due to distance and my daughter finally telling me quite bluntly that she didn't want me in her children's lives. All I can say about these transits is that they can definitely be significantly 'life changing'. The influence of Neptune can have a dissolving affect...disappearances, separations,estrangements, and this time around I am personally having to learn about 'detachment' without being devastated by it. My family was everything to me. Also this time around, I am now waiting for heart surgery next month [ my Saturn squares natal Venus/Leo] I hope that your upcoming transit will not be so 'dramatic and intense'. Remember that Pluto has a spiritual side as well, and it is about being empowered, rather than being victimized.