Shane did announce that they are looking at 2022 for release of the MTH models after upgrades to electronics and fitting the ST motors into MTH. The guys who founded ST he said also were the team that was at Athearn when Athearn purchased a line of tooling and Know what they are getting into.
I also saw Shane on you tube. My feeling is they were after the steam engines.
I always stayed away from MTH because everything I read about them was iffy.
TomO