As there are no real Canadian passenger routes in TS2019, I would like to propose just one. The VIA Rail Toronto to Montreal section. It is a long one. From Toronto to Ottawa is at least a 4 hour ride. I really like the line speed too. Now with 64bit, there are no worry's.
there is alot of opportunity with Via rail with trains such as Via Rail - Rupert Rocket - prince Rupert to Jasper Via Rail - The Canadian - Vancouver to Toronto Via Rail - The Ocean - Montreal to Halifax Via Rail - Ontario to Quebec there is also a few other routes such as Winnipeg to Churchhill Sudbury to White river Montreal to senneterre Montreal to Jonquiere
The Canadian would be awesome as DLC. We also need VIA P40DC Genesis diesels. The VIA Toronto-Montral route could be great. It has big cities. Also, we need both CP and CN diesels for freight action.