Good luck for them with their movie that's going to be essentially a docudrama without a real story. The simple reason why the media is full of "AMURICA WUN WW2!!!½½½!111!" is because the first advice to a storyteller is that if you have to choose between a legend and a true story, tell the legend.
America's singlehanded victory on the Western Front is a carefully constructed myth, and that's why it has been so succesful even outside the US. In order to trump that, you need to create another myth, or legend, and tell that instead. The Britons were on to something, when they (even post-war) blew the Battle of Britain out of all proportions, but did not have the poker face (or finances) to continue on that path.*
Were I ever to do a WW2 movie, well, given reasonably large budget, I do have an idea for telling a legend, and that has something to do with a certain airplane I have obsession with...
*) Finnish males might differ, for decades they've been raised on translated editions of British Commando comics, where the Britons win even the Pacific War single-handedly, and Americans are only included as a mysterious source of war materiel (if even that) or (even more rarely) as a lone supporting character that's always either a jovial comic relief or an arrogant by-the-books officer. In one particular case a recurring character Battler Britton (sic) even wins the Battle of Stalingrad (almost single-handedly, with a little help from stereotypical Soviets) when flying a Fairey bloody Swordfish of all things...
