Potential Train Sim World 2 route
Although you most likely have already decided which route you are going to make for your TSW2 launch, I would like to suggest the following as a suggestion.
I would personally really like to see the Chiltern Mainline in game. Starting from London Marylebone and heading via High Wycombe to Oxford would, I believe, be adequate distance. If you were to include the Greenford GWR branch to West Ealing and create both the Class 165/0 of Chiltern Railways and the Class 165/1 of GWR this would be fantastic. As far as other rolling stock goes, there are the following to choose from...
Class 168 Clubman
Class 170 and 172 Turbostar
Class 67 and 68 locomotive with Mk3 + DVT
Class 115 DMU
Class 121 DMU
I hope this suggestion is of interest to your team.