There was talk here on the forum some years ago that Weaver was considering the WM Potomac after the Lackawanna Pocono run. (Some thought it would just be a repaint of the Pocono). Of course it wasn't to be.
MTH, we could always hope.
3rd Rail, as stated above by R.Heil. So the WM fans/modelers need to show themselves, not just in words {this was part of the reason Weaver did not move forward, to my understanding}.
The C&LS model, exquisite! (Out of my price range at the time and I didn't want something simply sitting on a shelf).
I would still love to see it in three rail, and will patiently wait and see. (And, for the I-2 Decapod.) {D500 - Overland did this one in 2 rail quite a few years back as well}.