I'm playing the waiting game also. From what I could find out, CZ is waiting for the necessary permits from the Feds to be able to import the pistol form Bren 2. The government shutdown evidently slowed down the process. Now that the government is up and running (for a while anyway) maybe that part of things will speed up.
CZ is also changing the upper receiver on the Bren 2 with a shorter receiver to include a modular forend at the front which will supposedly come in different lengths to accommodate a can, a longer barrel, or other accessories down the road. The new version will differ from the approximately 300 Bren 2 military styled pistols that have already made it into the US. From what I can gather, it's similar in theory anyway, to the forend used on the CZ Scorpion and can be changed to different lengths, or at least that's my understanding.
Unfortunately there are so many legal issues involved with the importation of a foreign made firearm that the process takes seemingly forever. Still everyone seems to think that the Bren 2 will start appearing in the US in the first quarter of 2019. All we can do is wait and see.
Check out this link to CZ at Shot Show 2019. I don't know how reliable the information is, but at this point it's all we've got.
https://www.youtube.com/watch?v=G40z0hyju2k