There are two routes in TSW2, that includes S-Bahn Rhein-Ruhr. HRR and RRO. The boring thing on these routes is that they are both very short and separated from each other. If you want an another S-Bahn Rhein-Ruhr route, post below. EDIT: Köln-Duisburg (Connecting SKA and HRR, not RRO)
I agree. But it's not that simple. The HRR route is a bit problematic, because the terminus station (Essen) is located in the middle of the route, not at the start or end. So, if we want to see the full S1 line in TSW2, it would require, A, Two route extensions for HRR. B, One extension and one separate route. C, Two short separate routes. I don't think that anyone of these alternatives are probable, because DTG doesn't want to make extensions, because they require the original route to work, or waste their time for building two short routes to complete a route that already exist. So I don't think that we will see full S1 line in TSW in near future.