Valvrave the Liberator. Another mecha anime with series composition & screenplayby Ichiro Oukouchi. But unlike Code Geass, the original story was not by Oukouchi. Opening theme(s) are duets by T.M. Revolution and Nana Mizuki.
Though the series has yet to be released, Aniplex USA has already purchased the rights to Valvrave the Liberator. As an original project of Sunrise, the studio behind Tiger and Bunny, Cowboy Bebop and numerous mech anime, Valvrave may prove to be another hit series, something that Aniplex is surely hoping for.