From the YT vids I've seen (from GamingWheel and A Tribe Called Cars who both make lots of SR content), it looks like it could be very soon. The PTS version is apparently now very stable so usually they release ASAP after they get to that stage. i sugegst searching youtube for "snowrunner season 16" and/or watch this one: https://www.youtube.com/watch?v=Kk5SAWXOKPI&pp=ygUUc25vd3J1bm5lciBzZWFzb24gMTY%3D and this one:
https://www.youtube.com/watch?v=Y_L1-PmJyxg&pp=ygUUc25vd3J1bm5lciBzZWFzb24gMTY%3D