19 November 2019: Blog post about the drive from Plovdiv to Istanbul.
A similar message was also given in the comment section of one of their Instagram posts.
11 November 2019: SCS teased release day reveal in the comment section of their blog.
6 November 2019: Blog post about river ferry in Brăila, Romania.
23 October 2019: Steam achievements added.
17 October 2019: Blog post about servicing the cities.
15 October 2019: Update 1.36 Open Beta added some locations in Romania.
4 October 2019: Blog post about landmarks.
18 September 2019: Blog post about Turkish cities.
6 September 2019: Blog post about Bulgarian cities.
23 August 2019: Blog post about Romanian cities.
9 August 2019: Blog post about industries.
25 July 2019: Blog post about landscapes.
9 July 2019: Blog post about villages.
This post reveals there will be two border crossings between Hungary & Romania, three between Romania & Bulgaria and two between Bulgaria & Turkey.
25 June 2019: Blog post about border crossings.
7 June 2019: Blog post about Bulgaria.
: First official blog post about the map expansion with a few new screenshots + trailer and added to Steam Store.
4 April 2019: Blog post which teases the next map expansion with screenshots.
18 March 2019: A mysterious teaser video that includes Bulgarian bagpipe music was posted on SCS's YouTube channel and in their blog.
4 February 2019: During an ATS livestream, Pavel mentions that the next DLC for ETS2 is not connected to the base map of that game, possibly ruling out Slovenia and Croatia as part of the next DLC.
21 December 2018: SCS gives a hint to the next ETS2 DLC in their Christmas stream by first showing a plush bat (related to Romania) and then three images: one depicting the city of Veliko Tarnovo in Bulgaria, a photo of the Transfăgărășan/DN7C road in Romania, and a photo of the Corvin Castle in Romania.
Combining this with previous information, only the Balkans are left as a possible area.
29 November 2018: During the Beyond the Baltic Sea release stream, it is revealed that the next DLC will be in southern Europe.
23 June 2018: In a live stream, it is revealed that the map DLC after Beyond the Baltic Sea will not include Spain or Portugal.
Before June 2018: Research and pre-production on this map expansion started.
After that, SCS released information about the DLC in their blog: SCS Software first hinted about the DLC in a mysterious teaser video posted on 18 March 2019.