Vote for whatever of the 3 newest countries in tsw2 you think will get at least 1 new add on dlc in 2021.
The Swiss Arosa Line because the entire Train Sim World Community will want ABe 8/12 Allegra or the Ge 4/4 III. Both are playable for train simulator 21 Rhb routes Berina & Abula Lines.
Swiss is the most logical choice if you have to pick one, Rivet have a sizeable amount of Swiss content in TS Classic they can pull from. Considering that a new Swiss route would almost certainly happen at some point, and there's other locos as well that could be done. The others are by DTG, who have to concentrate on the core three regions, plus whatever other countries they decide to add in. I could see a new TGV being made since LGV's fairly popular, but that's about all I expect from France anytime soon. As for Canada I ain't expecting anything soon, Oakville isn't popular with most, so I don't see them adding in any new engines for it. And I don't see them doing any new routes, especially if they're increasing the US output to compensate for last year.
