Moin, something that I wasn't aware of until recently myself is: Leipzig's city tunnel, despite being designed for the S-Bahn primarily, also used to see usage by ICE trains, namely during the early stages of its operation - right when the TSW version is set. So, why not make use of that and release an ICE-T - the train used on the lines taking the tunnel and this way giving TSW its first share of DB long-haul. Granted, in reality, these trains turned east or west just north of the central station, but frankly, who cares. Two kinds of services would be possible: Leipzig Hbf to Bitterfeld (these would be trains toward Berlin) or Leipzig Hbf to Dessau for Magdeburg bound trains. More variety in services would come in from some trains stopping at Leipzig-Messe and some passing through. South of Leipzig Hbf - the other tunnel stations are passed through without stopping - the AI would take over and drive the ICEs off the map at some point in the south, maybe even all the way to Gaschwitz. While you're at it, some cargo services would be nice too. Either with some substituted loco or any newly made. BR 152, BR 189, maybe an oldschool BR 140 or 232... anything will do, really. Cargo trains could begin and end somewhere near Leipzig Nord or Messe and travel somwhere further north from there.