505 Games has announced that Guilty Gear 2: Overture will be released exclusively for Xbox 360 on 4th September in Europe.
Somewhat amazingly, GG2O has actually been out in Japan since November 2007, and in the States since October 2008, but hey, at least we're getting some.
Unlike other games in the series, Overture is an attempt to combine action and real-time strategy, which makes it sound a bit like Dynasty Warriors or, as the Wikipedia scribes suggest, a cross between Devil May Cry and Defense of the Ancients.
Having come out some time ago, there are also various reviews on Metacritic, although they're not very flattering and there's no word on any changes for the European version. We may take a look closer to the European release.