I held out waiting for the 3rd gen MDX and then bought the 2014 when it came out and at the time there was really fairly little info available about the vehicle. In the recent refresh where it went to the 9 speed trans and then the hybrid with the 3.0 engine and 7 sp trans came out and there seemed to be little heads-up about that as well other than the rumors of the hybrid. I don't recall any details about the infotainment being available before it was actually introduced.very surprised thought nothing is available on 2018 models yet.
Bottom line - don't expect a lot of details before a production model actually appears just about the time it becomes available and starts to appear at some of the car shows.