In its June/July 2018 All Scales Monthly Catalog, Atlas announced it will prodouce its Trinity 25,500 gallon tank car: undecorated ($26.96) and in new paint schemes ($35.95).
The pre-order deadline for this item, which among other features, comes with see-through walkway and top platform grating, 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 Trinity 25,500 gallon tank car on TroveStar.