I think this will not be something I will enjoy.
Mark Millar has a tendency, when doing things he's created, to become incapable of being subtle. He just goes to an extreme too quickly, and doesn't restrain himself. I'm trying to think of a single-creator owned project he's done that I've enjoyed and I can't.
He's very good, however, at really playing with established characters, taking them to a place they've always been but in a way that's very fresh. He did it terrifically with SUPERMAN: RED SON, THE AUTHORITY, SUPERMAN ADVENTURES, and of course, THE ULTIMATES.
I think part of the reason is because simply using a pre-existing character forces him to question himself more - I'm not sure.
So, this title, WAR HEROES, I think will be like much of Millar's creator-owned work - extreme and shallow, which annoys me greatly.
I'd love to enjoy WAR HEROES, but I seriously doubt, for me, that I will. :?