UPDATE - MTH pushed out the delivery dates on all of their Vol. 1 passenger cars.
20-64138 - B&O 4-car set - was April 2020, now December 2020
20-64153 - GM&O 4-car set - was April 2020, now February 2021
20-64158 - Illinois Central 4-car set - was May 2020, now December 2020
20-64178 - Union Pacific 4-car set - was June 2020, now January 2021