Note: this is not our insider, so we cannot confirm the news listed below.
Unofficial sources claim that most likely advanced 2D customization will be either just tested this year, or straightforward implemented into 9.21. WG had a working prototype for some time, allowing changing the color and size of various elements. Camo patterns will also be modifiable, however fans of pink tanks might be disappointed. Additionally, later the option to display ‘historical camo’ (like in WoWS) will be added, much to the joy of people with clown camo tanks. The second thing implemented will be 3D customization, so basically what War Thunder has since times uncountable.
Also, coming in December is the Advent Calendar, and a New Year event. Things to be debated on are further rebalances of vehicles and of course new tanks (maybe Polish ones included). Supposedly another round of the HD Sandbox wil be opened before the holidays.