In this wiki, I have found the version 1.33 for ets2 and ats. My possibilities in this update is new trucks added to the game (eg: Renaut T, MAN TGX E6, Volvo VNL, International) including their AI Varient, Baltic DLC release, Special Transport for ATS and this update may be released at December 2018 including DLC that will be released in this update. Do you agree of my prediaction?
Volvo VNL is already out, so it probably won't be in 1.33 too. And as we saw with VNL, trucks are not necessarily connected to any major updates. I'd rather say 1.33 will feature some more ownable trailers and new features we still don't know about.