A new bus sim game "Bus Simulator 18" will be released soon at June 2018 at Steam.
This new bus sim is made by same Austria game developer "stillalive studios" that made previous Bus Simulator 16. The publisher is German Astragon. The well most known bus sim games are: OMSI 2, Fernbus Simulator by TML studio and Bus Simulator 16. There is no update or news from Scs Software about their bus game it seems there will be no bus game from Scs they are making truck games and want focus on trucks only.
Bus Simulator 18 website: www.bussimulator-game.com