Wow, had no idea this was this close to happening. Despite the residual hatred I have for Card (unlike, say, Frank Miller, who I've always seen as a laughably over-the-top figure and therefore inoffensive, Card is someone whose works I read and enjoyed for years, and which seem to preach pretty much the exact opposite of what his real-world politics are) this is still a solid story if, as you say, they don't pussy out on making it about kids doing genocidal shit. (I wonder if The Hunger Games has played a role in getting this to the screen?)
One thing I will say for Card, apparently he was really adamant about having the War School be a truly international, multiracial bunch, and got pissed off at the Hollywood types who kept insisting that they had to keep it as white as possible.