July 2019 Update:
G22 4 Series is coming as expected in July 2020. It will mostly copy the G20 lineup, with one exception: RWD M440i seems unlikely. Don't expect manuals in the U.S.
Mild hybrid tech I mentioned first in the
May update will start expanding quickly next year (G22 will have it at intro, but it'll find its way into G05, G07, probably others I simply haven't noticed).