From the KM wiki, the eight versions of KM came out in 2002, 2004, 2008, 2009, 2011, 2013, 2015 and 2017. This is now 2019. There is an average of 2 years between versions. So are we due for a new version this year? If that's a trade secret Peter can ignore this post.
Possible Features in the Next Version of Keyboard Maestro
You might try this imperfect forum search to find Peter's hints about the next version, since 2019-01-01:
@peternlewis "next version" after:2019-01-01