Will I be able to use the TSW2 Scenario Planner to create new scenarios on routes I already have for TSW? Or will the TSW2 Scenario Planner only work on the routes that come with TSW2?
This was answered in the first Q&A session. The TSW2 Scenario Planner will only work with TSW2 routes, not the preserved collection (those from TSW1)
However, there is a way -- limited, but possible -- to make what might well be called "piggy-back" activities for TSW. To see an example of what I mean, take a look at this URL, which will take you to my guides page on Steam: https://steamcommunity.com/sharedfiles/filedetails/?id=2106734833. I learned how to do this by studying the work of the pioneers of this method, Harmer and nickhawk. If anyone's interested, I could put together a tutorial describing the process.