Dovetail Gameshave announced an announcement about the future of train simulation tonight at 17:00. Disappointingly this seems to replace the previously mentioned Twitch stream at that time. I don't think there will be much to get excited about however as Aerosoft were promoting Trains Simulator 2017 with existing routes at Gamescom including Marseille - Avignon... which is the route used in the promo above!
Still I could be wrong (hopefully!).
For your UE4 Train Simulator news check back on RailSimulationUK.blogspot.com.