I’d love to see Toronto in the game. We have a plethora of interesting features. There are 10 rivers and creeks in the Toronto area (the Credit River isn’t included in this picture, it would be at the far west/left side), and a small series of islands (bottom centre) which are inhabited and contain a small airport.
Currently our main east-west subway line crosses 3 of the rivers, (including a spectacular bridge over the Don River valley).
We currently have 3 true heavy-rail subways, plus numerous streetcar (tram) lines, an above ground intermediate-rail line (ICTS), an express heavy-rail line to the main airport, and several rapid-transit heavy-rail lines to the suburbs in the Greater Toronto Area
We also have a 4th (light-rail) subway line scheduled to open late next year, plus more heavy-rail extensions to the existing subway, and multiple light rail projects in various stages of planning or construction.
I envision Toronto in the game being similar to Paris, where there the “base” level is the Toronto Subway lines run by the city (the Toronto Transit Commision, or TTC), with an “unlockable” level of building out the regional/suburban rapid transit commuter network run by the province (Metroliox/GO Transit).