Al,
I wouldn't be so sure about that. The possibilities are here. That's right, gentlemen, right here! Some nay-sayers would have you believe that the 3 rail hobby is a behemoth of such inertia that these things can't be accomplished, but that "behemoth" is actually comprised of many smaller groups, all trying to get the attention of the manufacturers. There are the post-war only collecting and operating crowds, the post-war replica collecting and operating crowds, the "modern O" group that is divided by steam, transition, and diesel groups (just like O Scale). There are people who only operate on tubular track, versus those who operate exclusively MTH Scale Trax, Lionel Fast Tracks, or Atlas O (what I'd use if I were in 3 rail Scale). There is DCS, then Legacy versus those who are quite happy to stay with TMCC or straight AC for that matter. Add to that the Brotherhood of the ZW Transformer! Then there are the "I pledge allegiance to the color of my boxes" groups: Lionel, MTH, Williams, K-Line, Atlas O, etc.... and these are only a short list of everyone whining, complaining, pleading to "build my model!" It's no wonder that the manufacturing side is over-run with requests and confusion.
So what's my point? If We, as 2 Rail-O Scale and 3 Rail Scale Modelers, want these items to come to pass, and relatively quickly, WE have to speak up, again, and again, and again.....and when those projects do get announced, then RESERVE!..and put our POSITIVE and CONSTRUCTIVE criticism into guiding the manufacturer toward a model that truly reflects the prototype with correct construction, details, colors, etc. I can't say it enough, and yes, you will have to share the table with all these other groups who are clamoring for attention. Accept it, be one with it, love it, and make converts on your merry way! Speak up! Speak up! Speak up! OUR efforts will be rewarded!