As close to an “announced date” is the info Jorg furnished in the interview in this thread: New Interview with Jorg on MSFS 40th Anniversary And More
Sounds like sometime in later July:
" Calum [FSElite]: So we’re expecting the flight testing anytime soon?
Jorg: So we’re launching it on August 23. It will be in July. Right now, internally, the test team has enough time to actually test the build we have in our branch right now. And then we test it, make sure that the most obvious things are good, and then we give it out to the community and they’ll probably have a month."
Regards