UPDATE: Oh, looks like the official site is listing it as Spring 2012 again. Ze plot. She is thickening.
ORIGINAL: Looks like things have been flipped around a bit. On the official website, Aliens: Colonial Marines is listed with an Autumn 2012 release date, unlike the previously observed “Spring 2012.”
No official reason has been stated, but I think it has something to do with Randy Pitchford and John St. John traveling to outer space to kick some alien ass. Or it might be to coincide with a launch in the Wii U.