Thanks Taxman.
So is that new map in the game itself or just in PWCG?
PWCG doesn't include maps per se - it works with what the player already owns. This new map is the Battle of Bodenplatte map and is only available for those who have pre-ordered Battle of Bodenplatte.
Here is the main forum for PWCG:
https://forum.il2sturmovik.com/forum/99-pwcg-for-bos/