So with the new Monroe Subdivision being announced today, and with it being an ex-Missouri Pacific line, I think it would be good if we got the EMD GP15-1 officially as a loco DLC for this route. The GP15-1 was produced between 1976-1982, it produced 1,500hp and was bought by the Missouri Pacific, Chicago Northwestern, Conrail, and Frisco. Most of the MP and CNW locomotives are still in service with the UP. The rear radiator section of these locomotives were similar to Tunnel motors and were nicknamed "Baby Tunnel Motors". If this were to come to TS2020, I think at least these three schemes should come with it. Missouri Pacific, Union Pacific, and Union Pacific Yard.
David Brinley made a freeware model in the green MoPac livery. https://railworksamerica.com/index....p-emd-gp15-new-model&catid=18:engine-repaints
There were also GP15Ts and GP15ACs. MP had the AC versions as well as the original -1s. The Chessie Railroad had the GP15Ts. Also, BNSF has many of the ex-SLSF (Frisco RR) GP15-1s, and CSX has a few ex-Conrail engines. These engines could be a great yard switcher on several routes, including Cajon Pass, a CSX route, and maybe the Horseshoe Curve if we get Conrail addons for that route.