Apologies if it's been suggested before but I would love to see something like the Racetrack in TSW2. I realize that there are licensing issues with Chicago commuter lines but every Class 1 railroad shares tracks with Metra at some point, even CN. Plus lots of Amtrak services. It's a rich environment for train simming.
I love the thought of the Racetrack but honestly not now only because many railroad companies share lines there and with CSX being the only freight railroad in TSW2 that share lines there it would get boring fast when Norfolk Southern and BNSF and Sea Board plus RJ Corman have track rights there. I would rather have 2 or 3 railroad companies there than 1. DTGs would most likely make it only because it's a passenger rich route and pass it off as that and not a Freight route.