There seems to be nothing official going on anymore as far as I could find.
Sailfish OS on the Fairphone 2 is a community port, and Fairphone and Jolla had talks but didn’t reach an agreement.
… and that was November 2016.
Honestly, I tried Sailfish OS on my Fairphone 2, and it was running very well and was a nice OS and all, but it really finally died as a future option for me personally the moment I found out Alien Dalvik - which isn’t even available with the community port - only would run Android Apps in a simulated Android 4.4 and no further (for understandable technical reasons though).
If I would have to look beyond my current LineageOS installation now, I would certainly look into the UBports (ex Ubuntu Touch) direction instead. But LineageOS is behaving too well for that at the moment .