As much as I like MWG, I believe a new route would be nice. I think a good one would be the BNSF Scenic Subdivision (Stevens Pass) from Mukilteo, WA to Wenatchee, WA. Trains include the Amtrak Empire Builder, Sounder Commuter thru Mukilteo & Everett, Amtrak Cascades Talgos thru Mukilteo & Everett, the Boeing Supply Train (737 Fuselages, 777 parts cars & 747 parts cars), coal trains, grain trains, intermodel, & mixed freight. The route is absolutely beautiful & would be amazing for trainz. There is one for MSTS, Railworks, but none (That I can find) for trainz. Stations include (Sounder) Mukilteo, (Empire Builder & Sounder) Everett, (Empire Builder) Leavenworth, (Empire Builder) Wenatchee. Towns include (In order west to east) Mukilteo, Everett, Snohomish, Monroe, Sultan, Start-Up, Gold Bar, Skykomish, Scenic, Leavenworth, Pehastin, Dryden, Cashmere, Monitor, Wenatchee. Unique features include the Snohomish River bridge in Everett, the Everett Boeing branch out of Mukilteo, & Cascade Tunnel just east of Scenic. Unique towns include Leavenworth, which is a town of German culture. Most buildings there are of German design. Skykomish, as it says on the welcome sigh, is "A Great Northern Town". While it is very small, it has a lot of cool features. All road sighs are in the shapes of cabooses, a miniature riding railroad is right by the tracks, an old Great Northern SD9 in BN paint is sitting on a siding & it will soon be restored back into a GN unit for there historical program, Great Northern Logos are on a lot of buildings, a snow plow is stationed there for service when it snows (and it does a lot in winter), the old Skykomish Hotel and the old depot was just restored for the mini riding railroads train storage & office. Most of the way between Everett & Wenatchee are single track main with sidings in most (if not all) towns. The line is very busy as it is part of the high-line between Chicago, IL & Seattle, WA. If this route was ever made I would be so happy. I know it's a huge suggestion, but I know JR could do it!
Here are some pics of the unique features
The Skykomish Snow Plow
Boeing Supply Train in Skykomish
The old SD9 in Skykomish
Snohomish River swing bridges is Everett (top one is the rail bridge)
Cascade Tunnel East Portal
Cascade Tunnel West Portal
Welcome to Skykomish Sign
Leavenworth Buildings
Everett Boeing Train in Mukilteo