George asked this question:

So how does this coincide with Hasbro's Axis&Allies D-Day release?

I believe they will both be released about the same time - in June to celebrate the 60th anniversary of the D-Day landing.  I think the games will be quite different though.  I was fortunate enough to playtest A&A D-Day (strategy articles available), and I think it is quite good.  It is very similar to the large-scale A&A but simpler - smaller scale, no economy, and less playing time.  But the basic ideas are similar (movement, combat system).  And it is just D-Day.

Looking at Memoir 44, you will see a more generic game system with a variety of scenarios (ala Battle Cry).  So you'll have less geographic detail, the scale will be smaller, but you'll get more flexibility.