In its June/July 2018 All Scales Monthly Catalog, Atlas announced it will re-release its Classic Alco RS-1 Loco. This road switcher will come undecorated ($119.95), in new paint schemes ($129.95) for Morristown & Erie, Long Island Early 50s and Green Mountain as well as in new road numbers for Pennsylvannia, Santa Fe, Milwaukee Rd, Susquehanna and Amtrak.
The pre-order deadline for this item is Wednesday, July 25, 2018. Estimated arrival is Q1 2019.
Here is a link to the June/July 2018 All Scales Monthly Catalog pdf.
Here is a link to the Atlas Classic Alco RS-1 Loco on TroveStar.