Thanks for posting, I missed that info.
Lets hope the film is as good as the book ( I read it some years ago).
I'm no film buff , but think/hope the Russian film makers will keep with the general theme/style of the book
( ie heavy/Dark themes !!).
At the very least we won't have a Russian pilot/soldier turning up to fly/fight in the BoB / Dunkirk , Pearl Harbour/Guadacanal, D-day/Normandy etc
Now a good reason to re visit that book.