There's a whole world of things that have never been made. Since this maybe the end of the line; here are things I would like to see.
1) Logging locomotives (Climax, Shays.) There should be some undecorated for all the road names we had hoped to see that won't be made.
2) North Pole Express tinplate. MTH made some nice Railking products in Polar Express colors. Yes tinplate engines and cars in Polar Express Colors.
3) New York Central Berkshires. These were only produced once. They could use another run.
4) 44 Toners unpainted in industrial colors for placing your own roadnames.
5) 4-4-0's in major railroad names, Southern, N&W, Santa Fe, Eureka & Palisade or even undecorated. I would love to get a NYC 4-4-0 Vanderbilt.
Scott Smith