I've been saying this for so long. 70s era trains with raw power. Southern Pacific is where id love to see some action. Though it will never happen.
A C39-8 would be cool to see on NS HSC. The NS C39-8 could be included in both ex-Conrail patched livery and NS black livery. Also for NS: a C40-9 Top Hat, C40-9W, C40-8.5CW rebuild, C44-9W, and AC44C6M rebuild. For BNSF, a B40-8, B40-8W, C44-9W, and C40-8W/C41-8W are needed in both ATSF and BNSF liveries. Also, we should get BNSF's AC4400CWs and rebuilt AC44C4Ms. For UP, we need a C40-8, C40-8W/C41-8W, C44-9W/C44ACM, and AC6000CW/C4460AC/C44ACM. A UP Gas Turbine would be awesome to see on Sherman Hill, too. For CSX, we need a C44-8W/C40-9W, CW60AC/ES46AC, and B40-8. For CN, we need a C44-9W and AC44C6M. Also, I want more GEVOs, especially ET44 Tier 4s in BNSF (ET44C4, ET44C6H), UP (C45AH), CSX (ET44AH), NS, CN, KCS/CPKC, and GE Prototype liveries. ES44ACs/DCs should be added in BNSF, UP (C45ACCTE), CSX (ES44AC, ES44DC, ES40DC), NS (ES40DC), CN, and CPKC/KCS/CP. And of course, we need Amtrak Genesis units (P32AC-DM, P40DC, and P42DC) and P32-8BWH units.