According to recently report by Photography Bay at PhotoPlus 2015, Fujifilm X-Pro2 will be officially announced at CES 2016. X-Pro2 was just confirmed last several days ago.
X-Pro2 will be more advanced than X-T1, will be in stock in February, 2016.
From Pbay:
On the camera side of things though, the X-Pro2 should arrive at CES 2016 in January with availability in February 2016 and will be more advanced than the Fuji X-T1.
Additionally, same source also said that first Fujifilm full frame mirrorless camera will be coming in 2017.
From Pbay:
Additionally, more info from the same source Fuji will release a full frame sensor camera in the future (after 2016). I’ll believe the full frame sensor bit when I see it; however, I mention this as something to file away for future corroboration.
Read More: Fujifilm Rumors