There actually are not two different versions of the original box floating around. The “1942” image was released as an advance announcement and is of a prototype. All of the production boxes say “1941”. BGG has the prototype version of the box as its main image, which is very confusing. It has led more than one person to question whether a copy of AA50 being sold online is authentic. I have asked them several times to change it to the production version, and they have done so every time, but then someone else (presumably the person that uploaded the prototype image) asks them to change it back again.
One thing that actually puzzles me, I went to the link graciously provided by CWO Mark and while reading the page… it sounds like it is ALREADY available… (maybe it is my french canadian interpretation that read wrong) shouldn’t there be a “release date” on that page?