The X1D Mark II has passed FCC testing, report submitted on May 27th (yesterday) - so we are getting close. Whatever the X1D Mark II is it is the same size as the current X1D. Since it passed all emission, RFI, wi-fi and Bluetooth testing it should get approved soon.
My bet on announcement date is July 19, 2019 - the 50th year anniversary of the first Moon landing mission.
I don't know which way to bet:
1. An updated body with the same 50mp Sony sensor - not the best choice since that sensor will not be manufactured for that much longer.
2. A body with the Sony 100mp sensor - Sony will make that sensor in B&W or Color, how cool would it be to have a 100mp Monochrome X1D Mark II - Sony will also make that sensor with or without the phase detect masks - so it is hard to predict what Hassy might do - physically the 100mp sensors will fit fine, however, more processing power will be required and the 100mp chip does take more power than the 50mp, but not that much more.
3. A body with another sensor in the 80mp range (non-Sony) - that sensor could use nearly the identical image chain of the current X1D (gulp)
WRT to discussions on ASICs there seems to be confusion from the armchair speculators (of course that probably includes me as well) - there are ASICs and there are custom-ASICs - it is unlikely that Hassy would have the resources ($ and time) to do a custom-ASIC, however one never knows. Fujitsu makes an ASIC that is used by many camera manufacturers (Leica S for example), and Hassy could use that ASIC - however it is not clear that would solve all of their issues. Power up time seems to have to do with boot loading the FPGA (this would go away with ASIC), boot loading the embedded processor (which I've been led to believe is an ARM running an embedded version of Linux - that is not at all verified) and then loading the color calibration tables unique to each sensor (supposedly). I'm betting that the X1D may well also be loading some lens correction tables to make the live view and EVF work properly (although they still don't apply lens correction to the RAW in camera - which is a good thing). It is not clear how much work it would be to adapt the Fujitsu image processing engine ASIC to deal with the color calibration and the lens calibration?
In any case Hassy/DJI would not be spending money on certifications if the final pre-production units were not already completed and manufacturing was near ready to start - so very exciting news! We can lay to rest the TW-100 (Tumbleweed-100) post