Currently, according to the reports from Photo Rumors, the two cameras are thought to likely be announced at CES in 2017, which would be a perfect avenue for Fujifilm to announce two new highly requested cameras like the X-T20 and X100F. It is also worth noting that both of those names are not official, they just seem like the next logical name for those series of cameras, but Fujifilm could go a different direction with either series.
What is expected out of these cameras, at this point, is that they will include the latest Fujifilm X-Trans sensor technology, as well as at least some of the other bells and whistles introduced in the X-T2 and X-Pro2. The question here will be if Fujifilm how much crossover will there in terms of features between the flagship cameras and the sub-series cameras (X-T10, X-E2, etc); for example, will they have 4K video, or will they have dual card slots or the AF ‘joystick’.
What both cameras will have for sure is WiFi connectivity, as this is why they were registered with the Chinese Ministry of Industry and Information Technology in the first place, and thus the reason we even know about them at this point.
It will be interesting to see what Fujifilm does with these next round of releases, that much is certain.